{"title":"Coma Correctors","description":"\u003cp\u003e\u003cspan\u003eA coma corrector is \u003c\/span\u003e\u003cb\u003ea corrective lens for\u003cspan\u003e \u003c\/span\u003e\u003cspan role=\"tooltip\" tabindex=\"0\"\u003e\u003cspan class=\"c5aZPb\" data-enable-toggle-animation=\"true\" data-extra-container-classes=\"ZLo7Eb\" data-hover-hide-delay=\"1000\" data-hover-open-delay=\"500\" data-send-open-event=\"true\" data-theme=\"0\" data-width=\"250\" role=\"button\" data-ved=\"2ahUKEwiF69zayKqMAxVdmIkEHVXoEZAQmpgGegQIHBAD\" tabindex=\"0\"\u003e\u003cspan class=\"JPfdse\" data-bubble-link=\"\" data-segment-text=\"Newtonian telescopes\"\u003eNewtonian telescopes\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e. This type of telescope can cause distortion of the image at the edge of the field of view, making stars look like little comets. This aberration is therefore called 'coma'\u003c\/span\u003e\u003c\/p\u003e","products":[{"product_id":"tele-vue-paracorr-type-2-vip-2010","title":"Tele Vue Paracorr Type 2 (VIP-2010)","description":"\u003ch2\u003eTele Vue Paracorr Type 2\u003c\/h2\u003e\n\u003cp\u003eMount your DSLR or CCD to the Tele Vue Paracorr Type 2 lens assembly and the quality of full frame photos will be spectacular since star image sizes on the image plane can be less than .001″ over the full frame for an f\/4.5 mirror. Edge-of-field sharpness is further enhanced since Paracorr also acts as a field-flattener. Works on all f-ratios f\/3 and slower without adding any false color or spherical aberration! NOTE: Curves shown are typical for mirror focal lengths in the 1200mm or longer focal length range. For focal lengths shorter than 1200mm, you might find some field curvature. In general, we recommend APS size formats, which would typically yield 90% illumination over a 30mm diagonal chip.\u003c\/p\u003e\n\u003cp\u003eThe Paracorr Type 2 allows separating the optical assembly from the Tunable Top and using it with Tele Vue imaging system components to permit use with SLR and CCD cameras. APS size formats 27mm diameter are recommended to minimize field vignetting. Ideal for mirrors as fast as f\/3.\u003c\/p\u003e\n\u003ch4\u003eBackground\u003c\/h4\u003e\n\u003cp\u003eAn optical chain is as good as its weakest link. With the development of 82 degree Nagler and 100+ degree Ethos eyepieces, Tele Vue offers the largest, flattest and best corrected visual fields in the industry. Combine the Nagler\/Ethos revolution, Dobsonian revolution and Paracorr for the ideal mating for spectacular wide and sharp “spacewalk” observing.\u003c\/p\u003e\n\u003cp\u003eLife without Paracorr\u003cbr\u003eComa makes stars look like blurry comets whose tails point out radially from the center of the field. The faster your scope’s speed, the worse the effect. All parabolic mirrors used in Newtonian reflecting telescopes are limited in field sharpness due to coma. Even a perfectly made 13″ f\/4.5 parabola has only about 0.1 degree diffraction limited field.\u003c\/p\u003e\n\u003cp\u003ePrevious attempts to correct for coma have been limited in usefulness. Some correctors were designed mainly for astrophotography, some required difficult installation in the focuser’s draw tube. Dedicated coma correcting eyepieces were another approach. However, these were limited to 50 degree apparent fields and would orphan your existing eyepiece collection.\u003c\/p\u003e\n\u003cp\u003eLife with Paracorr\u003cbr\u003eParacorr is a universal corrector that tightens and intensifies star images on all f-ratios down to f\/3! (see spot size graphs: PDF or JPG) without adding any false color or spherical aberration! You no longer have to constantly shift a Dobsonian to keep objects centered for sharp viewing. Using a Tele Vue eyepiece, put M-13 at the edge of the field and enjoy fully resolving its beauty as it drifts across your view.\u003c\/p\u003e\n\u003cp\u003eParacorr is easy to use. It slips into your focuser, just like a Barlow. To minimize focuser in-travel, due to additional length, a mild 15% Barlow effect was designed into Paracorr to effectively push the focus out. Paracorr is recommended for use with all Tele Vue eyepieces because our Plössls, Radians, Panoptics, Naglers, Ethos and Delos eyepieces achieve higher levels of aberration correction than competitive models. However, Paracorr is also compatible with other eyepiece makes.\u003c\/p\u003e\n\u003cp\u003eParacorr Eats Coma\u003cbr\u003eParacorr can be used with both 2″ and 1¼” eyepieces. For visual use, slip Paracorr Type-2 into your focuser like a Barlow lens, and your eyepiece into Paracorr. 1¼” eyepieces will make use of Paracorr’s special low profile 1¼” reducing adapter. Paracorr is threaded for 2″ filters.\u003c\/p\u003e\n\u003cp\u003eSIPS\u003cbr\u003eNote: The Paracorr Type 2 optical assembly is also available in a special adapter housing made by Starlight Instruments for their Feather Touch focusers. This unit avoids the need for a tunable top to optimize eyepiece position. Some Dobsonian manufacturers may also offer the Feather Touch focuser with integrated Paracorr type 2 as standard. Starlight Instruments offers Paracorr Type 2 integrated with Feather Touch focuser or as an add-on if you already have a Feather Touch focuser.\u003c\/p\u003e\n\u003cp\u003eAstrophotography\u003cbr\u003eParacorr also works with DSLR and CCD cameras. Just unscrew the lens assembly from the Tunable Top and attach appropriate threaded accessory tubes and camera mounts. See 2″ Imaging (Paracorr Type-2) and 3″ Imaging (3″ BIG Paracorr Type-2) sections for more on Paracorr imaging.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003cdiv aria-labelledby=\"tab-title-local_1\" role=\"tabpanel\" id=\"tab-local_1\" class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_1 panel entry-content\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eIn the Box\u003c\/span\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv aria-labelledby=\"tab-title-local_2\" role=\"tabpanel\" id=\"tab-local_2\" class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_2 panel entry-content\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eParacorr Type 2\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eManuals \u0026amp; Warranty \u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTele Vue 5-Years Warranty\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Tele-Vue-Paracorr-Tunable-Top-with-1.25in-Adapter-Instructions.pdf?v=1670007770\" target=\"_blank\"\u003eParacorr Type-2 Instructions\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Tele Vue","offers":[{"title":"Default Title","offer_id":43125699805413,"sku":"TV-VIP-2010","price":808.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/tele-vue-paracorr-type-2-vip-2010-astronomy-plus-1_d0439e77-f98d-4974-817c-4429fa3d101f.jpg?v=1690483994"},{"product_id":"tele-vue-big-paracorr-type-2-vip-3010","title":"Tele Vue Big Paracorr Type 2 (VIP-3010)","description":"\u003ch2\u003eTele Vue Big Paracorr Type 2\u003c\/h2\u003e\n\u003cp\u003eTele Vue’s 3″ Big Paracorr Type 2, designed by Paul Dellechiaie, extends the Paracorr type 2’s optical benefits for imaging applications by amateurs and professionals using CCD formats as large as 52mm diagonal and paraboloids as fast as f\/3. Back focal length has been extended to 80mm to allow for additional accessories to be placed in the optical path. The 5.1″ length optical assembly is topped with a “stop” flange having 3.40″-24 pitch threads to mount camera adapters and spacer tubes\u003c\/p\u003e\n\u003ch4\u003eBackground\u003c\/h4\u003e\n\u003cp\u003eAn optical chain is as good as its weakest link. With the development of 82 degree Nagler and 100+ degree Ethos eyepieces, Tele Vue offers the largest, flattest and best corrected visual fields in the industry. Combine the Nagler\/Ethos revolution, Dobsonian revolution and Paracorr for the ideal mating for spectacular wide and sharp “spacewalk” observing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLife without Paracorr\u003c\/strong\u003e\u003cbr\u003eComa makes stars look like blurry comets whose tails point out radially from the center of the field. The faster your scope’s speed, the worse the effect. All parabolic mirrors used in Newtonian reflecting telescopes are limited in field sharpness due to coma. Even a perfectly made 13″ f\/4.5 parabola has only about 0.1 degree diffraction limited field.\u003c\/p\u003e\n\u003cp\u003ePrevious attempts to correct for coma have been limited in usefulness. Some correctors were designed mainly for astrophotography, some required difficult installation in the focuser’s draw tube. Dedicated coma correcting eyepieces were another approach. However, these were limited to 50 degree apparent fields and would orphan your existing eyepiece collection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLife with Paracorr\u003c\/strong\u003e\u003cbr\u003eParacorr is a universal corrector that tightens and intensifies star images on all f-ratios down to f\/3! (see spot size graphs: PDF or JPG) without adding any false color or spherical aberration! You no longer have to constantly shift a Dobsonian to keep objects centered for sharp viewing. Using a Tele Vue eyepiece, put M-13 at the edge of the field and enjoy fully resolving its beauty as it drifts across your view.\u003c\/p\u003e\n\u003cp\u003eParacorr is easy to use. It slips into your focuser, just like a Barlow. To minimize focuser in-travel, due to additional length, a mild 15% Barlow effect was designed into Paracorr to effectively push the focus out. Paracorr is recommended for use with all Tele Vue eyepieces because our Plössls, Radians, Panoptics, Naglers, Ethos and Delos eyepieces achieve higher levels of aberration correction than competitive models. However, Paracorr is also compatible with other eyepiece makes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eParacorr Eats Coma\u003c\/strong\u003e\u003cbr\u003eParacorr can be used with both 2″ and 1¼” eyepieces. For visual use, slip Paracorr Type-2 into your focuser like a Barlow lens, and your eyepiece into Paracorr. 1¼” eyepieces will make use of Paracorr’s special low profile 1¼” reducing adapter. Paracorr is threaded for 2″ filters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSIPS\u003c\/strong\u003e\u003cbr\u003eNote: The Paracorr Type 2 optical assembly is also available in a special adapter housing made by Starlight Instruments for their Feather Touch focusers. This unit avoids the need for a tunable top to optimize eyepiece position. Some Dobsonian manufacturers may also offer the Feather Touch focuser with integrated Paracorr type 2 as standard. Starlight Instruments offers Paracorr Type 2 integrated with Feather Touch focuser or as an add-on if you already have a Feather Touch focuser.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAstrophotography\u003c\/strong\u003e\u003cbr\u003eParacorr also works with DSLR and CCD cameras. Just unscrew the lens assembly from the Tunable Top and attach appropriate threaded accessory tubes and camera mounts. See 2″ Imaging (Paracorr Type-2) and 3″ Imaging (3″ BIG Paracorr Type-2) sections for more on Paracorr imaging.\u003c\/p\u003e\n\u003cdiv class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_1 panel entry-content\" id=\"tab-local_1\" role=\"tabpanel\" aria-labelledby=\"tab-title-local_1\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eBig Paracorr Type 2\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eIn the Box\u003c\/span\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_2 panel entry-content\" id=\"tab-local_2\" role=\"tabpanel\" aria-labelledby=\"tab-title-local_2\"\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003e2″ Camera Adapter\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty \u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.televue.com\/Pdf\/Literature\/Lifetime%20Limited%20Warranty%20for%20Eyepieces.pdf?utm_source=print\u0026amp;utm_medium=paper\u0026amp;utm_campaign=printTVOEPWarranty\u0026amp;utm_content=TVOEPWarranty\"\u003eTele Vue Lifetime Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Big-Paracorr-Type-2-Instructions.pdf?v=1669923884\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eBig Paracorr Type-2 Instructions\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tele Vue","offers":[{"title":"Default Title","offer_id":43125700002021,"sku":"TV-VIP-3010","price":1754.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/tele-vue-big-paracorr-type-2-vip-3010-astronomy-plus-1_862e19c8-95a1-4483-bc6b-c5cf72e80fdb.jpg?v=1690484000"},{"product_id":"tele-vue-paracorr-tunable-top-with-1-25-adapter-att-2125","title":"Tele Vue Paracorr Tunable Top with 1.25\" Adapter (ATT-2125)","description":"\u003ch2\u003eTele Vue Paracorr Tunable Top with 1.25\" Adapter\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Paracorr Tunable Top with 1.25\" Adapter is the tunable top from the standard Tele Vue 2” Paracorr Type-2. It permits positioning all eyepieces for optimum coma correction. For use on the BIG Paracorr Type-2, the “VISA” (Visual \/ Imaging System Adapter), is required. A 3” Tunable Top is not required since secondary mirror size limits maximum exit pupil diameter to around 7mm. Therefore, the widest true field eyepiece choice with an f\/3 (f\/3.45 when used with Paracorr) is Tele Vue’s own 21mm Ethos, which delivers a 6.1mm exit pupil at f\/3.45.\u003c\/p\u003e\n\u003cdiv aria-labelledby=\"tab-title-local_1\" role=\"tabpanel\" id=\"tab-local_1\" class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_1 panel entry-content\" data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eIn the Box\u003c\/span\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv aria-labelledby=\"tab-title-local_2\" role=\"tabpanel\" id=\"tab-local_2\" class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_2 panel entry-content\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eTunable top\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e2″-1.25″ Adapter\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eManuals \u0026amp; Warranty \u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTele Vue 5-Years Warranty\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Tele-Vue-Paracorr-Tunable-Top-with-1.25in-Adapter-Instructions.pdf?v=1670007770\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eTele Vue Paracorr Tunable Top with 1.25″ Adapter Instructions\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Tele Vue","offers":[{"title":"Default Title","offer_id":43125717303525,"sku":"TV-ATT-2125","price":288.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/tele-vue-paracorr-tunable-top-with-1-25-adapter-att-2125-astronomy-plus_8fa9246a-8e33-40b8-ac31-8be3d916fafb.png?v=1690484242"},{"product_id":"sky-watcher-quattro-coma-corrector-s20204","title":"Sky-Watcher Quattro Coma Corrector (S20204)","description":"\u003ch2\u003eSky-Watcher Quattro Coma Corrector\u003c\/h2\u003e\n\u003csection data-product-wrapper=\"\" class=\"product--container layout--three-col\"\u003e\n\u003csection data-product-tabs=\"\" class=\"product-section-tabs\"\u003e\n\u003cdiv class=\"product-tabs-content\"\u003e\n\u003cdiv data-pdp-tab-content=\"description\" class=\"pdp-content-description rte active\"\u003eDelivers stunning wide-field views with pinpoint stars to the edge of the field. Magnification remains unaltered.\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv data-pdp-tab-content=\"description\" class=\"pdp-content-description rte active\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv data-pdp-tab-content=\"description\" class=\"pdp-content-description rte active\"\u003e\n\u003cbr\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSky-Watcher Quattro Coma Corrector\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSky-Watcher 2-Year Warranty\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/section\u003e\n\u003csection data-related-products=\"\" class=\"product-section--container product-row--container related-products--container\"\u003e\u003c\/section\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":43125768585445,"sku":"SW-S20204","price":680.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/sky-watcher-quattro-coma-corrector-s20204-astronomy-plus_42ca0f82-509a-4a06-8a58-250218f87aca.jpg?v=1690485120"},{"product_id":"baader-2-mark-iii-mpcc-multi-purpose-coma-corrector-photographic-version-mpcc","title":"Baader 2\" Mark III MPCC Multi Purpose Coma Corrector (MPCC)","description":"\u003ch2\u003eBaader 2\" Mark III MPCC Multi Purpose Coma Corrector\u003c\/h2\u003e\n\u003csection class=\"product--container layout--three-col\" data-product-wrapper=\"\"\u003e\n\u003csection class=\"product-section-tabs\" data-product-tabs=\"\"\u003e\n\u003cdiv class=\"product-tabs-content\"\u003e\n\u003cdiv class=\"pdp-content-description rte active\" data-pdp-tab-content=\"description\"\u003e\n\u003cul\u003e\n\u003cli\u003eComa corrector for Newton telescopes, that reduces neither the focal length nor the image field of your telescope\u003c\/li\u003e\n\u003cli\u003eLarge lenses for completely vignetting-free exposures up to f \/ 3.5. Maximum sharpness over the entire image field\u003c\/li\u003e\n\u003cli\u003ePhantom Coating™ Group multicoated for maximum transmission and total freedom from reflections\u003c\/li\u003e\n\u003cli\u003eNext to the photographic only version, there is also a visual version that contains all parts of the base elements as well as additional adapters for visual application:\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e2458400A: Photographic Version\u003c\/b\u003e with removable 2\" Stoppring, usable either with T-2 (M42x0.75) or M48x0.75 connection\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e2458403: Visual Version (V-1 Set)\u003c\/b\u003e contains all parts of the photographic Version MPCC Mark III #2458400A as well as 1¼\" to T-2 focusing eyepiece clamp (#2458125) and adjustable VariLock T-2 extension tube 20 – 29 mm (#2956929)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstrong\u003ePlease note:\u003c\/strong\u003e This set replaces the former set #2458402 for visual and photographic application of the MPCC Mark III. The old set consisted of a multitude of rings – \u003cstrong\u003ebut was not adjustable in optical length such as this V-1 set.\u003c\/strong\u003e The new Baader Planetarium MPCC MkIII enables owners of fast Newtonian telescopes to use their instrument for taking stunning wide-field images, or visually, for delivering wide-field views with stars that remain pinpoint to the edge - with no magnification increase! The MPCC has been optimized for Newtonians with focal ratios from f\/3.5 to f\/6, and will deliver 12micron stars across a full 35mm frame size. Independent optical laboratory tests (by ITE) have confirmed that the MPCC is the sharpest wide-field coma corrector available for imaging, and provides the best edge of field illumination (least vignetting). Visual users have reported great results even down to f\/3.5. The optics are anti-reflection coated with Baader's PHantom Group Multicoatings. The MPCC is also priced very reasonably. It's modularity lets you purchase only the parts you need. For imaging with DSLRs, only the MPCC is required (for the maximum field size, the MPCC MkIII is designed to work perfectly with the Baader Protective EOS T-rings). For visual, the MPCC MkIII can be configured with any of our eyepiece holders or directly coupled to 2\" eyepieces using Astro T-2 System components.\n\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003ch4\u003eVISUAL\u003c\/h4\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pdp-content-description rte active\" data-pdp-tab-content=\"description\"\u003eDob users with f\/3.5 - f\/5 scopes have been discovering the unique benefits of the MPCC versus other coma correctors. The MPCC can be inexpensively configured for visual use with 1¼\" and 2\" eyepieces. Please see our MPCC Visual Configuration page for new information on some exciting visual configurations. No Magnification Increase: The MPCC delivers full fields for the widest 2\" eyepieces. Why spend the big $$ on a large widefield eyepiece, only to have its field squeezed by the coma corrector. Now, a 31mm ultra-widefield eyepiece can perform like a 31mm, and not a 26mm.. Also, unlike some correctors, the MPCC has minimal effect on the eyepoint and blackout behavior of long focal length eyepieces. No additional Back-Focus (in-travel) Required: In fact, in direct-coupled configurations, the MPCC actually increases back-focus by about 10mm. If your eyepiece will focus without a coma corrector, it Will reach focus with the MPCC. This is not the case with some other coma correctors. Reduced Vignetting: The new MPCC MkIII now works even better with the largest true field 2\" eyepieces. Due the closer position of the field lens to the focal plane, the MPCC MkIII is able to provide a larger fully illuminated true field than any other coma correctors (both visually and photographically) Low Cost: The MPCC is priced lower than other correctors. Some users have even purchased more than one and leave them permanently attached to their favorite 2\" eyepieces.\n\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003ch4\u003eIMAGING\u003c\/h4\u003e\nThe MPCC is the perfect match for today's Digital SLRs. Owners of these new cameras find them to be ideally mated with today's fast f\/3.5-f\/5 Newtonians required to keep exposures short. The MPCC enables these users to fully correct their scopes and produce superb pinpoint color deep sky images without the complexity of more expensive CCD astrocameras. Owners of Vixen Newtonians will appreciate the inclusion of filter threads, and the high sharpness of the images. Unlike other coma-correctors, the MPCC does NOT extend the focal ratio (so, your images will be shot at the full speed of your telescope).\n\u003cdiv\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0267\/1172\/0013\/files\/MPCC_III_Tring_Med_480x480.jpg?v=1586883847\" alt=\"MPCC MkIII - with Baader Protective T-ring\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eMPCC MkIII - with Baader Protective T-ring\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0267\/1172\/0013\/files\/MPCC_III_Tring_Expl_Med_480x480.jpg?v=1586883865\" alt=\"Exploded View\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eExploded View\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\nThe MPCC inserts into 2\" focusers and has external T-threads on the output side (and is also threaded for standard 2\"\/48mm filters). Simply attach any 35mm film or digital SLR to the MPCC, using commonly available T-adapters. Users of CCD cameras can attach in the same way through the use of our Astro T-2 System components (adapters, extension tubes). The MPCC is designed for a nominal 55mm distance from the mounting flange to the film plane (55mm is the standard dimension for all SLRs, measured from the front of their T-adapter to their image plane). It also extends the focus point by approximately 10mm, so no additional back-focus is needed to use the MPCC (of course, this assumes your camera will already reach focus in your telescope, without the MPCC). The MPCC alsoincludes a removable stop flange. Removal of this flange exposes an M48 external thread, which enables the MPCC to be directly coupled to 2\" eyepieces and inserted fully inside 2\" focusers. For more info, please see MPCC Visual Configuration.\u003c\/div\u003e\n\u003cdiv class=\"pdp-content-description rte active\" data-pdp-tab-content=\"description\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"pdp-content-description rte active\" data-pdp-tab-content=\"description\"\u003e\n\u003ch3\u003eTechnical Specifications\u003cbr\u003e\n\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pdp-content-description rte active\" data-pdp-tab-content=\"description\"\u003e\n\u003ch2 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-family: 'Libre Franklin', sans-serif; font-style: normal; font-weight: 600; letter-spacing: normal; text-transform: none; font-size: var(--font-size-heading-2); margin-top: 1.875rem; margin-bottom: 0.9375rem; color: #4c4c4c; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; text-align: start; text-indent: 0px; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003ePhotographic\u003c\/span\u003e\u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"data-table\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid rgba(128, 128, 128, 0.16); box-shadow: rgba(128, 128, 128, 0.11) 0px 1px 4px; display: block; border-collapse: collapse; max-width: 100%; height: auto; overflow: auto; white-space: normal; background-color: #ffffff; width: 1499.53px; text-align: left; table-layout: fixed; color: #4c5154; font-family: 'Libre Franklin', sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\n\u003ctbody style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eEAN CODE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003e4047825029126\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eMANUFACTURER\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eSKU (#)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003e2458400A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eWEIGHT (NETTO)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003e0.084\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eINNER CONNECTION (LENS SIDED)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eThread, M48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eOUTER CONNECTION (LENS SIDED)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eBarrel, 2\" (50,8mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eOUTER CONNECTION (EYEPIECE\/-CAMERA-SIDED)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eThread, T-2 (M42 x 0,75), M48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eAR-COATING\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003ePhantom Coating® Group\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eWORKING RANGE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003ef\/3.5 – f\/6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eIMAGE SCALE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003e1:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eTRANSMISSION\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003e98%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eINNER DIAMETER \/ CLEAR APERTURE (MM)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003e44\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eUSAGE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eeliminiert praktisch die gesamte Koma an Newton Teleskopen ohne die Brennweite zu verändern\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eBARREL SIZE (IN)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003e2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eOPTICAL DESIGN\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eComa Corrector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eCOMPATIBLE TELESCOPES\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 585.488px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eNewton\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pdp-content-description rte active\" data-pdp-tab-content=\"description\"\u003e\n\u003cbr\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2\" Mark III Multi Purpose Coma Corrector\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e2-Year Warranty\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/section\u003e\n\u003csection class=\"product-section--container product-row--container related-products--container\" data-related-products=\"\"\u003e\u003c\/section\u003e","brand":"Baader Planetarium","offers":[{"title":"Photographic","offer_id":44458239459557,"sku":"BAA-MPCC (Baader #2458400A)","price":271.0,"currency_code":"CAD","in_stock":true},{"title":"Visual and Photographic","offer_id":44458239492325,"sku":"BAA-MPCC-VISUAL (Baader #2458403)","price":328.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/baader-2-mark-iii-mpcc-multi-purpose-coma-corrector-photographic-version-mpcc-astronomy-plus.webp?v=1690487086"},{"product_id":"sharpstar-coma-corrector-mpcc-ss-mpcc","title":"Sharpstar Coma Corrector MPCC (SS-MPCC)","description":"\u003cdiv data-mce-fragment=\"1\"\u003e\n\u003ch1 data-mce-fragment=\"1\"\u003eSharpstar Coma Corrector MPCC\u003cbr\u003e\n\u003c\/h1\u003e\n\u003cp\u003eFollowing the advent of 0.95x coma corrector for Newtonian reflector, SHARPSTAR optics has well received the favor of customers with high praise.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eA new 1x full-frame coma corrector is now available to meet the needs of different market segments. Optimized for the aberration correction, it adopts a new Quadruplet air-spaced design, which includes an extra-low dispersion lens, same as the 0.95x, it features 2\" with 55mm focal length, which is very convenient and simple to connect your imaging equipment.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSuitable model：150mm-600mm, paraboloid reflector\u003cbr\u003eFocal ratio: F3-F6\u003cbr\u003eMagnification: 1.0x\u003cbr\u003eImage Circle: available scope of 44mm\u003cbr\u003eThe lens number: Quadruplet\u003cbr\u003eOuter diameter: φ50.8mm (2\")\u003cbr\u003eBack focus: 55mm (Distance between the end face of the baffle ring and the focal plane)\u003cbr\u003eOverall Length: 118.7mm\u003cbr\u003eOptical Coatings: Fully multi-coated\u003cbr\u003eWeight: 0.35kg\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSharpstar Coma Corrector MPCC\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/div\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003eSharpStar Warranty\u003c\/div\u003e\n\u003c\/div\u003e","brand":"SharpStar","offers":[{"title":"Default Title","offer_id":43628368429285,"sku":"SS-MPCC","price":427.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/sharpstar-coma-corrector-mpcc-ss-mpcc-astronomy-plus-1.webp?v=1690488438"},{"product_id":"starizona-nexus-0-75x-newtonian-focal-reducer-coma-corrector","title":"Starizona Nexus 0.75x Newtonian Focal Reducer\/Coma Corrector","description":"\u003ch1 class=\"product-title\"\u003eNexus 0.75x Newtonian Focal Reducer\/Coma Corrector\u003c\/h1\u003e\n\u003cdiv class=\"shopify-section product--section\" id=\"shopify-section-static-product\"\u003e\n\u003csection data-product-wrapper=\"\" class=\"product--container layout--two-col\"\u003e\n\u003carticle class=\"prod-description\"\u003e\n\u003cdiv data-product-description=\"\" class=\"product-description rte\"\u003e\n\u003cstrong\u003eTurn your Newtonian telescope into a fast, high-quality astrographic instrument with the Starizona Nexus focal reducer.\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eNewtonian telescopes require a coma corrector in order to give sharp stars over a large field of view, but most coma correctors keep the telescope's native focal ratio or even make the scope slower. The Nexus instead acts as a coma corrector and also provides a 0.75x focal reduction factor. This turns a common f\/4 Newtonian into an f\/3 system, giving a larger field of view and reducing exposure times by a factor of 1.8x.\u003cbr\u003e\u003cbr\u003eThe Nexus incorporates extra-low dispersion (ED) glass in a sophisticated optical design that gives performance equal to the best coma correctors while decreasing, instead of increasing, the focal length. The Nexus is also designed to be parfocal, so it does not change the original focal point of the telescope. The corrected image circle is 28mm, accommodating camera sensors up to APS format. While nominally designed for the popular commercial f\/4 imaging Newtonians, the Nexus can work with Newtonians as fast at f\/3.\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/10_-PacManNexus_2400x1524_54777041-c583-4d4f-82ba-6a82ef1fdb0b_480x480.webp?v=1679073742\" alt=\"\" width=\"634\" height=\"403\" data-mce-fragment=\"1\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/10_-PacManNexus_2400x1524_54777041-c583-4d4f-82ba-6a82ef1fdb0b_480x480.webp?v=1679073742\"\u003e\u003cbr\u003eBackfocus requirement for the Nexus is 55mm, matching the common standard for most coma correctors, field flatteners and focal reducers. This distance allows for the use of DSLRs as well as mirrorless cameras and most astronomical CMOS and CCD cameras. The Nexus has M48 threads on the camera side. The barrel of the Nexus is a standard 2\" diameter to fit most focusers. On the telescope end are M48 threads for a standard 2\" filter.\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/6_-M31Nexus_695x465_82d162d0-3329-4ae1-8332-c5bc2c81552b_480x480.webp?v=1679073728\" alt=\"\" width=\"597\" height=\"399\" data-mce-fragment=\"1\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/6_-M31Nexus_695x465_82d162d0-3329-4ae1-8332-c5bc2c81552b_480x480.webp?v=1679073728\"\u003e\u003cbr\u003e\u003cbr\u003e* Some slower Newtonians that were originally intended for visual use will not reach focus with some cameras using the stock focuser. The Nexus preserves the original focus point of the telescope, so if the camera can reach focus without the Nexus it will reach focus with it. However, note that the Nexus (and most other coma correctors) require a 55mm backfocus. This means the camera has to be able to focus with that much backfocus. A CMOS camera that has a backfocus of 17.5mm, for example, might reach focus on a certain Newtonian but would not when the backfocus is extended to 55mm as required by a coma corrector. Most commercial f\/4 Newtonians are designed with plenty of backfocus for a coma corrector because they are intended for photography. But some slower Newtonians intended for visual use do not have enough backfocus for a coma corrector and camera. Please feel free to contact us if you are unsure of your telescope's compatibility.\u003c\/div\u003e\n\u003cdiv data-product-description=\"\" class=\"product-description rte\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp class=\"product-description rte\"\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFocal Reduction Factor: 0.75x\u003c\/li\u003e\n\u003cli\u003eImage Circle:  28mm (APS format)\u003c\/li\u003e\n\u003cli\u003eIn-Focus Required: None (parfocal)*\u003c\/li\u003e\n\u003cli\u003eBackfocus: 55mm\u003c\/li\u003e\n\u003cli\u003eCamera Threads: M48 x 0.75\u003c\/li\u003e\n\u003cli\u003eFilter Threads: M48 (2\" mounted)\u003c\/li\u003e\n\u003cli\u003eBarrel Size: 2\"\u003c\/li\u003e\n\u003cli\u003eOverall Length: 3.14\" (80mm)\u003c\/li\u003e\n\u003cli\u003eWeight: 0.74 lbs (335g)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/article\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003cdiv data-currency=\"$\" id=\"related_products_app_html\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch3 class=\"product-section--container\"\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eNexus Corrector\u003c\/p\u003e\n\u003ch3 class=\"product-section--container\"\u003eManuals \u0026amp; Warranty \u003c\/h3\u003e\n\u003cp class=\"product-section--container\"\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/starizona-warranty\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eStarizona 1-Year Warranty\u003c\/a\u003e\u003cbr\u003e\u003ca href=\"https:\/\/starizona.com\/pages\/downloads\" title=\"Instructions\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eInstructions\u003c\/a\u003e\u003c\/p\u003e","brand":"Starizona","offers":[{"title":"Default Title","offer_id":43969777598693,"sku":"SZA-NEXUS-075","price":630.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/starizona-nexus-0-75x-newtonian-focal-reducercoma-corrector-astronomy-plus-1.webp?v=1690489344"},{"product_id":"sharpstar-2-0-95-coma-corrector-095x-coma","title":"SharpStar 2\" 0.95× Coma Corrector (095x-COMA)","description":"\u003ch1\u003eSharpStar 2\" 0.95× Coma Corrector\u003cbr\u003e\n\u003c\/h1\u003e\n\u003cp\u003eSharpstar 2\" 0.95× coma corrector can be applied to most marketable Newtonian reflective astrographs.\u003c\/p\u003e\n\u003cp\u003eIt’s of high quality and easy to use. Sharpstar 2\" 0.95× coma corrector is designed for APS-C imaging circles(28mm), suitable for Newtonian reflectors with focal ratio between f\/3 and f\/6, and aperture size from 150mm to 600mm.\u003c\/p\u003e\n\u003cp\u003eThe reduction factor is 0.95×, thus it can reduce the original f\/4, f\/5 and f\/6 respectively to f\/3.8, f\/4.75 and f\/5.7, effectively shortening the exposure time. Besides, it can improve the star shapes. The diameter of stars in the center of the field can be limited within 10um.\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"pdp-content-description rte active\" data-pdp-tab-content=\"description\"\u003e\n\u003ch3\u003eTechnical Specifications\u003cbr\u003e\n\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pdp-content-description rte active\" data-pdp-tab-content=\"description\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"pdp-content-description rte active\" data-pdp-tab-content=\"description\"\u003e\n\u003ctable align=\"center\" cellspacing=\"0\" width=\"84.20%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e150-600mm, f\/3-3\/6 parabolic reflectors\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eReduction factor\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e0.95×\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eImage circle\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e44mm(maximum), 28mm(optimal)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eLens\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003etriplet structure\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eOuter diameter\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e50.8mm(2\")\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eBack focus\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e56mm(starting from the field-stop-ring to the focal plane)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e79.7mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eCoating\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003efull-surface multi-layer coatings\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e0.22kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSharpStar 2\" 0.95× Coma Corrector \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSharpStar Warranty\u003c\/p\u003e\n\u003c\/div\u003e","brand":"SharpStar","offers":[{"title":"Default Title","offer_id":46310309953765,"sku":"SS-095x-COMA","price":427.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Sharpstar-2-095x-Coma-Corrector.webp?v=1730930812"},{"product_id":"explore-scientific-hr-variable-coma-corrector-2-inch-hrcc02-00","title":"Explore Scientific HR Variable Coma Corrector (2-inch) (HRCC02-00)","description":"\u003ch1\u003eExplore Scientific HR Variable Coma Corrector (2-inch)\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eAfter hours at the eyepiece, you finally get to view the fruits of your astrophotography labors. The stars in the center of the field pop like brilliant precise points of light. But as you survey the image, you notice the stars at the edge have taken on an unnatural comet-like shape. Your long night has been marred by coma. Coma is a common plague of the Newtonian reflector design, and its annoying presence at the outskirts of an image can be a bane for astronomers of all levels.\u003c\/p\u003e\n\u003cp\u003eExplore Scientific’s HR Variable Coma Corrector is a high-performance optical corrector designed by world famous optical designer Harrie Rutten, and it will help you minimize or even eliminate image aberrations caused by this off-axis optical phenomenon even in fast Newtonians. This 2-inch coma corrector with is EMC Coated to reduce internal reflections and its spacer with markings allow you to use the device on almost any Newtonian telescope with a parabolic primary mirror, even fast Newtonians such as the\u003cspan\u003e \u003c\/span\u003eBRESSER N20839 f\/3.9 Photo Newtonian. Tightly secured by three thumbscrews, this accessory comes with two adapters (M42x0.75 and M48x0.75) to secure to your T adapter and a protective cap.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eItem Number\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"speccell\"\u003eHRCC02–00\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eWeight\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"speccell\"\u003e1lb; .45kg\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eDiameter\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"speccell\"\u003e69.3mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eHeight\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"speccell\"\u003e147.2mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\u003cspan class=\"speccell\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003ch3 class=\"spanrow\"\u003e\u003cspan class=\"speccell\"\u003eIn the Box\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan class=\"speccell\"\u003eExplore Scientific HR Variable Coma Corrector\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"speccell\"\u003eWarranty\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan class=\"speccell\"\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/explore-scientific-warranty\"\u003eExplore Scientific 1-Year Warranty (You need to register)\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":46412945588453,"sku":"ES-HRCC02-00","price":350.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/HRCC02-00_1_869x869_a2273e17-5785-447e-afa1-3685a2566e2f.webp?v=1735402738"},{"product_id":"starfield-1-1x-coma-corrector-cm-01","title":"Starfield 1.1x Coma Corrector (CM-01)","description":"\u003ch1\u003eStarfield 1.1x Coma Corrector\u003c\/h1\u003e\n\u003cp class=\"MsoNoSpacing\"\u003eNewtonian inherit an optical distortion called as Coma, where stars at corner appears not round but bloated like a tadpole shape. The Starfield Optics coma corrector will provide a flat field image when Use on a Newtonian telescope that works from range of F\/3-F\/6. The large 2'' corrector will provide widest field of illumination for even full frame DSLR without vignetting\u003c\/p\u003e\n\u003cp class=\"MsoNoSpacing\"\u003eThe Starfield Optics 2'' Coma Corrector will significantly enhance your visual experience as well, providing coma free view with sharp pin point stars. 2\" nosepiece features recessed safety groove and is threaded to accept standard 2\" filters\u003c\/p\u003e\n\u003cul type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\"\u003e2\" eyepiece barrel features brass compression ring and dual large thumbscrews\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eMagnification factor of 1.x\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eFully Multicoated\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e3-piece modular design (i) Optics in 2\" nosepiece with 48mm male filter thread (ii) 2' eyepiece barrel that attaches to optical nosepiece, and (iii) M48 - T2 adapter ring\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eBack-focus spacing requirement is approx. 70mm +\/- 5mm from the shoulder of the 2\" nosepiece to the image plane\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003eFor visual use: connect the 2\" eyepiece barrel to the main optical nosepiece\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eFor photo use: unscrew the 2\" eyepiece barrel and attach the included M48-T2 ring to the main optical nosepiece Then attach your D\/SLR camera to the male T2 thread via a camera-specific T-ring (not included)\u003c\/p\u003e\n\u003ch3 class=\"MsoNormal\"\u003eTechnical Specifications \u003c\/h3\u003e\n\u003cul type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\"\u003eFully Multi-Coated Optic\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e4 elements - 2 lens groups\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e50mm (2'') Barrel Fit\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e43.9mm Clear Aperture\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e4 Element In 2 Groups Design Corrector\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eMagnification Factor 1.1x\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eDesign optimized for use at f\/4.5 but will work well from f\/3 - f\/6\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eInternal Edge Darkened\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003e Weight:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLower barrel with lens elements: 7.4 oz\u003c\/li\u003e\n\u003cli\u003eUpper eyepiece holder: 4.1 oz\u003c\/li\u003e\n\u003cli\u003eComplete unit for visual use: 11.8 oz\u003c\/li\u003e\n\u003cli\u003eT thread adapter: 0.3 oz\u003c\/li\u003e\n\u003cli\u003eComplete unit for photo use: 7.7 oz\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"MsoNormal\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"MsoNormal\"\u003eComa Corrector\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e20mm extension tube\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eT2 Ring adapter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/starfield-warranty?_pos=4\u0026amp;_sid=2afe9b2b3\u0026amp;_ss=r\" target=\"_blank\" rel=\"noopener\"\u003eStarfield Limited Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e \u003c\/p\u003e","brand":"Starfield","offers":[{"title":"Default Title","offer_id":46533043093733,"sku":"SF-CM-01","price":160.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_16c728c2-9fb3-4cc4-90fb-02805e76e074.webp?v=1739907281"},{"product_id":"baader-2-newtonian-1-7x-coma-correcting-glasspathcorrector®","title":"Baader 2\" Newtonian 1.7x Coma-Correcting Glasspathcorrector® (2456300)","description":"\u003ch2\u003eBaader 2\" Newtonian 1.7x Coma-Correcting Glasspathcorrector®\u003c\/h2\u003e\n\u003cp\u003eThe Baader 2\" Glasspathcorrector® 1.7x for Newtonian Telescopes is a high-performance optical accessory with a full aperture and integrated coma-corrector, designed for advanced visual observation and correction of optical path issues.\u003c\/p\u003e\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e2\" Glasspathcorrector® Factor 1.7 for Newtons- at full aperture with integrated Coma-Corrector.\u003c\/li\u003e\n\u003cli\u003eSuitable to insert into the Baader MaxBright® II Binoviewer and the Mark V Giant Binoviewer (insert diameter: ˆ… 2\"- 50.8mm, incl. M48 filter thread).\u003c\/li\u003e\n\u003cli\u003eA Baader Glaspathcorrector® is not a Barlow lens! The reason for this name is only secondly the displacement of the focal point.\u003c\/li\u003e\n\u003cli\u003eA Glaspathcorrector® is primarily intended to correct the prismatic colour fringing that occurs on Refractors due to the high amount of glasses used in binocular prisms.\u003c\/li\u003e\n\u003cli\u003eFor usage with the former MaxBright® Mark I or other binoviewers with T-2 but no Zeiss dovetail, you need additionally the T-2a Change Ring with Zeiss Dovetail (#2456320). Both parts are also available as a set: 2\" Glasspathcorrector® 1.7x for Newtons incl. T-2 change ring (#2456301).\u003c\/li\u003e\n\u003cli\u003eSaved Optical Path: ca. 80mm.\u003c\/li\u003e\n\u003cli\u003eIncludes 1x T-2 Dustcap with Zeiss-Dovetail (#2904020).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGlasspathcorrector® (GK) for Binocular Viewers and more\u003c\/strong\u003e\u003cbr\u003eThe 2\" Glasspathcorrectors for Binocular Viewers provide full aperture compatibility for your Baader MaxBright® and the Mark V Giant Binocular Viewer!\u003c\/p\u003e\n\u003cp\u003eThese large Glasspathcorrectors make it possible to mount a binocular viewer on almost ANY telescope with a 2\" connection. Even owners of \"fast\" (i.e., short focal length) refractors and photographic Newtonians can enjoy views of deep sky objects with both eyes without vignetting, reflections, or light loss.\u003c\/p\u003e\n\u003ch4\u003e\n\u003cstrong\u003eFor Newtonians with DSLR camera compatibility\u003c\/strong\u003e:\u003c\/h4\u003e\n\u003cp\u003eThe corrector is delivered ready to connect to the Mark V Giant Binocular Viewer. To connect to the MaxBright® Binoviewer, the T-2a Change Ring with Zeiss dovetail (#2456320, ‚¬48) from the Astro T-2 System® is also required€”both parts are available as a set (#2456301). Owners of Dobsonian Newtonians should ensure they have 25 mm of \"backfocus\" available. For Synta and GSO Newtonians, the Four-in-One Adapter (#2458190) is recommended. This adapter can be screwed directly onto the M60 thread at the base plate of the focuser, replacing the standard long 2\" insert, saving up to 40 mm of optical path length.\u003c\/p\u003e\n\u003cp\u003eThe Glasspathcorrector® 1.7x for Newtonian reflectors reduces the optical path by approximately 80 mm, enabling focus compatibility for many Newtonian telescopes with a binocular viewer.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eBaader Glasspathcorrector (GK) 1.25x\/1.7x\/2.6x\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe Glasspathcorrectors with factors of 1.25x, 1.70x, and 2.60x shorten the optical path length. Measurements were taken using a 2\" focuser on a Traveler 105mm\/f6 apochromat with 35mm ED eyepieces, a giant field binocular viewer, a 90° T-2 diagonal prism, and the Glasspathcorrectors. When the lens system is placed in front of the prism, the focal length is shortened by about an additional 15 mm.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eFocal Distance (optical path length)\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eWithout correction\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eWith GK 1:1.25\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eWith GK 1:1.70\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eWith GK 1:2.60\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrom the support surface at the focuser- with 90° T-2 prism\u003c\/td\u003e\n\u003ctd\u003e162 mm (unfocusable)\u003c\/td\u003e\n\u003ctd\u003e144 mm\u003c\/td\u003e\n\u003ctd\u003e122 mm\u003c\/td\u003e\n\u003ctd\u003e79 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStraight-through with 2\" adapter (no prism, important for Newtonian mirrors)\u003c\/td\u003e\n\u003ctd\u003e112 mm\u003c\/td\u003e\n\u003ctd\u003e94 mm\u003c\/td\u003e\n\u003ctd\u003e71 mm\u003c\/td\u003e\n\u003ctd\u003e28 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStraight-through with T-2 Quick Changer\u003c\/td\u003e\n\u003ctd\u003e123 mm\u003c\/td\u003e\n\u003ctd\u003e105 mm\u003c\/td\u003e\n\u003ctd\u003e82 mm\u003c\/td\u003e\n\u003ctd\u003e39 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003cp\u003eThese three lens systems solve focusing problems for nearly all common telescope types. The lens housing includes both a connection thread for the giant field binocular viewer and a T-2 clamping flange. This flange can be clamped at any T-2 (M42) thread connection between the positive and negative thread parts, enabling unexpected experimental possibilities (using accessories previously not usable with your telescope).\u003c\/p\u003e\n\u003ch4\u003eBaader Glasspathcorrector (GK) 1.25x- Example Use with Baader Safety Herschel Wedge\u003c\/h4\u003e\n\u003cp\u003eGlasspathcorrector® 1:2.6\u003cbr\u003eFor this Glasspathcorrector®, the lens housing must not be opened, as the lenses are individually centred and optimised for maximum performance as a Glasspathcorrector® (not a Barlow lens!). Only \"Lens Configuration B\" is available for this corrector (see the Astro T-2 System® information sheet). The 2.6x Glasspathcorrector® can be screwed directly into any T-2 diagonal prism or T-2 amici prism and installed directly in front of the giant field binocular viewer.\u003c\/p\u003e\n\u003cp\u003eAdditionally, as explained above, the 2.6x Glasspathcorrector® can be clamped between any T-2 thread connections at its thin flange. The flat, thin edge of the Glasspathcorrector® must always face the eyepiece, while the lens housing must face the telescope.\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/anschlussmoglichkeiten_f748b8ea-eda7-44d4-bd25-0def42241e45_1024x1024.webp?v=1773856342\"\u003e\u003c\/div\u003e\n\u003ch4\u003e\u003cstrong\u003eConnection Examples\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eGlasspathcorrectors with 1.25x and 1.7x Factors\u003c\/strong\u003e\u003cbr\u003eFor these correctors, the lenses are cemented and can be removed from the housing and installed in reverse. For all applications, the convex (outward-curved) lens side must always face the telescope (or the sky) when installed in the housing.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch4\u003e\u003cstrong\u003eBinocular Viewing\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eGiant Field Binocular Viewer (only applies to GK 1:1.25 and GK 1:1.7)\u003c\/strong\u003e\u003cbr\u003eThe Glasspathcorrector® is screwed directly into the Zeiss Micro-Adapter (dovetail) on the front of the binocular viewer.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch4\u003e\u003cstrong\u003eMaxBright® Binocular Viewer\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eAll Glasspathcorrectors are installed in \"Lens Configuration B\" (lens housing facing away from the binocular viewer). Space or a screw thread is provided for this configuration in T-2 prisms, 1.25\" sleeves, or 2\" sleeves. To save optical path length, the lens part of the Glasspathcorrectors® is not inserted into the binocular viewer. The beam splitter of the binocular viewer is positioned as close as possible to the viewer's front edge.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0267\/1172\/0013\/files\/markv-zubehoer.jpg?v=1738003766\"\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eT-2 Thread Connections\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eWhenever a new accessory cannot achieve focus due to insufficient focuser travel, the Baader Glasspathcorrector® may be the solution. Nearly every telescope manufacturer provides a T-2 connection for their devices. These adapters are usually very short because the T-2 thread is typically intended for attaching a 35mm camera. This is exactly where the Baader Glasspathcorrector® is installed.\u003c\/p\u003e\n\u003cp\u003eBaader manufactures a wide range of eyepiece clamps, spacer rings, and adapters with T-2 threads (e.g., the universal adapter and T-2 spacer ring 40mm or 15mm length), ensuring a suitable connection can almost always be assembled.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch4\u003e\u003cstrong\u003eCamera Lenses\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eIf you have a camera lens with a T-2 thread, many \"third-party lenses\" (e.g., Tokina, Soligor, Vivitar, etc.) allow the bayonet ring to be removed, revealing a T-2 thread. Using the Baader Glasspathcorrector® with the T-2 sliding focusing tube or the 1.25\"\/T-2 eyepiece holder, you can visually use your existing 1.25\" diagonal prism and generally all 1.25\" eyepieces with the camera lens!\u003c\/p\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3\u003eTechnical Specification\u003c\/h3\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Name\u003c\/td\u003e\n\u003ctd\u003e2\" Glaswegkorrektor® 1.7x fØ.25r Newtons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eArticle Number\u003c\/td\u003e\n\u003ctd\u003e2456300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter (mm)\u003c\/td\u003e\n\u003ctd\u003e54 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEAN Code\u003c\/td\u003e\n\u003ctd\u003e4047825011145\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Telescopes\u003c\/td\u003e\n\u003ctd\u003eNewton\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.26\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eGlasspathcorrector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification (x)\u003c\/td\u003e\n\u003ctd\u003e1.7x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBaader 2\" Newtonian 1.7x Coma-Correcting Glasspathcorrector®\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/istronomyplus.com\/pages\/baader-warranty\" target=\"_blank\"\u003eBaader 2-Year Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":48585062351077,"sku":"BAA-ORJ (Baader #2456300)","price":316.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/9744_1536x1536_c7e9291c-ab86-4155-824c-14e91119cf1d.webp?v=1773856876"},{"product_id":"houdini-30-mm-80-coma-correcting-eyepiece-cc30","title":"Houdini 30 mm 80° Coma-Correcting Eyepiece (CC30)","description":"\u003ch1\u003eHoudini 30 mm 80° Coma-Correcting Eyepiece\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eWith its coma-corrected 80° field, this 30 mm eyepiece delivers the widest fully corrected true field of view available on the market. It is the ultimate wide-field eyepiece for any Newtonian telescope.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWell-corrected ultra-wide\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e80° field with sharp star images\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eacross the field even with fast Newtonian optics\u003c\/li\u003e\n\u003cli\u003eComfortable\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e20 mm eye relief\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith foldable rubber eyecup\u003c\/li\u003e\n\u003cli\u003eMulti-coated optics combined with high transmission glass types and blackened lens edges for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esuperb contrast\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat field\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erequiring less than 0.7 diopters of accommodation across the field\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow distortion\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edelivering constant magnification across the field\u003c\/li\u003e\n\u003cli\u003eHandy size and weight with comfortable rubber grips\u003c\/li\u003e\n\u003cli\u003eFilter-threaded\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebarrel with safety kerfs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethat do not lock, slip, or tilt in the focuser\u003c\/li\u003e\n\u003cli\u003eEyepiece cap with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eglow in the dark focal length\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRead more about \u003c\/span\u003e\u003ca href=\"https:\/\/www.houdinitelescopes.com\/benefits-of-coma-correcting-eyepieces\" data-jwlink-title=\"Benefits of Coma-Correcting Eyepieces\" data-jwlink-identifier=\"24821286\" data-jwlink-type=\"page\"\u003ethe benefits of coma-correcting eyepieces\u003c\/a\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv id=\"jw-element-545760045\" data-jw-element-id=\"545760045\" class=\"jw-tree-node jw-element jw-image-text\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eHoudini Eyepiece Performance\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"jw-element-545768808\" data-jw-element-id=\"545768808\" class=\"jw-tree-node jw-element jw-image-text\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\" style=\"text-align: start;\"\u003e\n\u003cp\u003eThe following graph illustrates the performance of the Houdini eyepieces in a F\/4 Newtonian telescope. Spot diagrams  with 3,000 rays are shown\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eat the center, halfway, and near the edge of the field.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe spots have been\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003estrongly\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003emagnified to show them clearly. In the center of the field a spot diagram smaller than 2' is almost perfect, at the edge a spot diagram smaller than 10' is considered excellent. The top left shows 2' and 5' circles.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere is no trace of coma left in the Houdini spot diagrams. Some spherical aberration and some lateral color remain, which shows on very bright objects, such as a magnitude 1 star or Jupiter, at the edge of the field. This is not visible at all in a typical deep sky field that does not contain magnitude 1 stars. Such a field will appear essentially sharp from edge to edge.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/houdini-comparison-chart-20-12-7-30-high-st92yh_1024x1024.webp?v=1778881755\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2\u003e30mm 80° Coma-Correcting Eyepiece\u003c\/h2\u003e\n\u003ctable class=\"jw-table jw-table--style-striped jw-table--size-medium\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"50%\"\u003eFocal length\u003c\/td\u003e\n\u003ctd width=\"50%\"\u003e30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent field of view\u003c\/td\u003e\n\u003ctd\u003e80°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField stop\u003c\/td\u003e\n\u003ctd\u003e42.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLayout\u003c\/td\u003e\n\u003ctd\u003e8 elements in 6 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTheoretical eye relief (center of field, to glass)\u003c\/td\u003e\n\u003ctd\u003e20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUseful eye relief (edge of field, to body)\u003c\/td\u003e\n\u003ctd\u003e15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. diameter\u003c\/td\u003e\n\u003ctd\u003e64.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall height including eyecup\u003c\/td\u003e\n\u003ctd\u003e140 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel length\u003c\/td\u003e\n\u003ctd\u003e38 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e580 gr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel\u003c\/td\u003e\n\u003ctd\u003e2 inch (50.8 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal point\u003c\/td\u003e\n\u003ctd\u003e2 mm above barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField flatness\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.7 diopters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAngular magnification distortion\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEAN\u003c\/td\u003e\n\u003ctd\u003e05419980565846\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv id=\"jw-element-545759494\" data-jw-element-id=\"545759494\" class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eHoudini Eyepiece Specifications\u003c\/h2\u003e\n\u003ctable class=\"jw-table jw-table--header jw-table--style-striped jw-table--size-medium\" width=\"100%\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth width=\"12%\"\u003eEyepiece\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eFocal Length mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eAFOV °\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eField Stop mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eLayout\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eEye Relief mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eWeight g\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eDiameter mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eHeight mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eBarrel\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eBarrel Length mm\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eFocal Point mm\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eFlatness diopter\u003c\/th\u003e\n\u003cth width=\"9%\"\u003eAngular Magnification Distortion\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"12%\"\u003eHoudini 30*\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e30\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e80\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e42.0\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e580\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e64.5\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e140\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e2\"\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e38\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e+2\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd width=\"9%\"\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e30.0\u003c\/td\u003e\n\u003ctd\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd\u003e570\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003ctd\u003e140\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003ctd\u003e35\u003c\/td\u003e\n\u003ctd\u003e+2\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 12\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e18.0\u003c\/td\u003e\n\u003ctd\u003e9 \/ 7\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e330\u003c\/td\u003e\n\u003ctd\u003e51\u003c\/td\u003e\n\u003ctd\u003e121\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 9*\u003c\/td\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e13.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e48.5\u003c\/td\u003e\n\u003ctd\u003e127\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 7\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e290\u003c\/td\u003e\n\u003ctd\u003e47\u003c\/td\u003e\n\u003ctd\u003e129\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eAFOV = Apparent Field of View\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eLayout: Number of Elements \/ Number of Groups\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eEye Relief: Theoretical Eye Relief (center of field, to glass) \/ Effective Eye Relief (edge of field, to body)\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eDiameter: Maximum diameter of the aluminum body - the rubber grips add around 1 mm to the diameter\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eHeight: Includes the height of the eyecup\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eBarrel: Standard size 2\" = 50.8 mm or 1.25\" = 31.75 mm\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eFocal Point: Position of the focal plane with respect to the barrel. Positive values are above and negative values are below the top of the barrel\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e30 mm 80° Coma-Correcting Eyepiece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/istronomyplus.com\/pages\/houdini-warranty\" target=\"_blank\"\u003eHoudini limited lifetime Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Houdini","offers":[{"title":"Default Title","offer_id":49062029852901,"sku":"HOU-CC30","price":713.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/H30-1.png?v=1778882211"},{"product_id":"houdini-20-mm-86-coma-correcting-eyepiece-cc20","title":"Houdini 20 mm 86° Coma-Correcting Eyepiece (CC20)","description":"\u003ch1\u003eHoudini 20 mm 86° Coma-Correcting Eyepiece\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eThe world's first coma-correcting eyepiece for Newtonian telescopes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eWell-corrected ultra-wide\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e86° field with sharp star images\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eacross the field even with fast f\/3 Newtonian optics\u003c\/li\u003e\n\u003cli\u003eComfortable\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e20 mm eye relief\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith foldable rubber eyecup\u003c\/li\u003e\n\u003cli\u003eMulti-coated optics combined with high transmission glass types and blackened lens edges for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esuperb contrast\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat field\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erequiring less than 0.7 diopters of accommodation across the field\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow distortion\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edelivering constant magnification across the field\u003c\/li\u003e\n\u003cli\u003eHandy size and weight with comfortable rubber grips\u003c\/li\u003e\n\u003cli\u003eFilter-threaded\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebarrel with safety kerfs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethat do not lock, slip, or tilt in the focuser\u003c\/li\u003e\n\u003cli\u003eEyepiece cap with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eglow in the dark focal length\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRead more about\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.houdinitelescopes.com\/benefits-of-coma-correcting-eyepieces\" data-jwlink-title=\"Benefits of Coma-Correcting Eyepieces\" data-jwlink-identifier=\"24821286\" data-jwlink-type=\"page\"\u003ethe benefits of coma-correcting eyepieces\u003c\/a\u003e.\u003c\/p\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text\" data-jw-element-id=\"545760045\" id=\"jw-element-545760045\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eHoudini Eyepiece Performance\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text\" data-jw-element-id=\"545768808\" id=\"jw-element-545768808\"\u003e\n\u003cdiv style=\"text-align: start;\" class=\"jw-element-imagetext-text\"\u003e\n\u003cp\u003eThe following graph illustrates the performance of the Houdini eyepieces in a F\/4 Newtonian telescope. Spot diagrams  with 3,000 rays are shown\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eat the center, halfway, and near the edge of the field.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe spots have been\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003estrongly\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003emagnified to show them clearly. In the center of the field a spot diagram smaller than 2' is almost perfect, at the edge a spot diagram smaller than 10' is considered excellent. The top left shows 2' and 5' circles.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere is no trace of coma left in the Houdini spot diagrams. Some spherical aberration and some lateral color remain, which shows on very bright objects, such as a magnitude 1 star or Jupiter, at the edge of the field. This is not visible at all in a typical deep sky field that does not contain magnitude 1 stars. Such a field will appear essentially sharp from edge to edge.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/houdini-comparison-chart-20-12-7-30-high-st92yh_1024x1024.webp?v=1778881755\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\" data-jw-element-id=\"417947655\" id=\"jw-element-417947655\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eWill it work in my telescope?\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-last-child\" data-jw-element-id=\"417947656\" id=\"jw-element-417947656\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003cp\u003e\u003cspan\u003eThe Houdini eyepieces were designed for Newtonian telescopes with parabolic mirrors, but they will also work well with any telescope with a focal ratio of f\/6 or slower (f\/8, f\/10, etc.). This includes slow refractors and most popular Schmidt-Cassegrain telescopes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe eyepiece is not recommended for use with fast telescope systems without parabolic mirror, such as f\/5 APO refractors.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2\u003e20mm 86° Coma-Correcting Eyepiece\u003c\/h2\u003e\n\u003ctable class=\"jw-table jw-table--style-striped jw-table--size-medium\" width=\"100%\" style=\"height: 313.501px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd width=\"50%\" style=\"height: 19.5938px;\"\u003eFocal length\u003c\/td\u003e\n\u003ctd width=\"50%\" style=\"height: 19.5938px;\"\u003e20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eApparent field of view\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e86°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eField stop\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e30.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eLayout\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e8 elements in 6 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"height: 39.1875px;\"\u003eTheoretical eye relief (center of field, to glass)\u003c\/td\u003e\n\u003ctd style=\"height: 39.1875px;\"\u003e20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eUseful eye relief (edge of field, to body)\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eMax. diameter\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e64 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eOverall height including eyecup\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e140 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eBarrel length\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e35 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e570 gr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eBarrel\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e2 inch (50.8 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eFocal point\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e2 mm above barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eField flatness\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e\u0026lt; 0.7 diopters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eAngular magnification distortion\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eEAN\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e5419980565808\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\" data-jw-element-id=\"545759494\" id=\"jw-element-545759494\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eHoudini Eyepiece Specifications\u003c\/h2\u003e\n\u003ctable width=\"100%\" class=\"jw-table jw-table--header jw-table--style-striped jw-table--size-medium\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth width=\"12%\"\u003eEyepiece\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eFocal Length mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eAFOV °\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eField Stop mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eLayout\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eEye Relief mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eWeight g\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eDiameter mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eHeight mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eBarrel\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eBarrel Length mm\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eFocal Point mm\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eFlatness diopter\u003c\/th\u003e\n\u003cth width=\"9%\"\u003eAngular Magnification Distortion\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"12%\"\u003eHoudini 30*\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e30\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e80\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e42.0\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e580\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e64.5\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e140\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e2\"\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e38\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e+2\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd width=\"9%\"\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e30.0\u003c\/td\u003e\n\u003ctd\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd\u003e570\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003ctd\u003e140\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003ctd\u003e35\u003c\/td\u003e\n\u003ctd\u003e+2\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 12\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e18.0\u003c\/td\u003e\n\u003ctd\u003e9 \/ 7\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e330\u003c\/td\u003e\n\u003ctd\u003e51\u003c\/td\u003e\n\u003ctd\u003e121\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 9*\u003c\/td\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e13.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e48.5\u003c\/td\u003e\n\u003ctd\u003e127\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 7\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e290\u003c\/td\u003e\n\u003ctd\u003e47\u003c\/td\u003e\n\u003ctd\u003e129\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eAFOV = Apparent Field of View\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eLayout: Number of Elements \/ Number of Groups\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eEye Relief: Theoretical Eye Relief (center of field, to glass) \/ Effective Eye Relief (edge of field, to body)\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eDiameter: Maximum diameter of the aluminum body - the rubber grips add around 1 mm to the diameter\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eHeight: Includes the height of the eyecup\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eBarrel: Standard size 2\" = 50.8 mm or 1.25\" = 31.75 mm\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eFocal Point: Position of the focal plane with respect to the barrel. Positive values are above and negative values are below the top of the barrel\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e20 mm 86° Coma-Correcting Eyepiece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/houdini-warranty\" rel=\"noopener\" target=\"_blank\"\u003eHoudini limited lifetime Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Houdini","offers":[{"title":"Default Title","offer_id":49062087688421,"sku":"HOU-CC20","price":570.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/H20-1.png?v=1778883390"},{"product_id":"houdini-12-mm-86-coma-correcting-eyepiece-cc12","title":"Houdini 12 mm 86° Coma-Correcting Eyepiece (CC12)","description":"\u003ch1\u003eHoudini 12 mm 86° Coma-Correcting Eyepiece\u003c\/h1\u003e\n\u003cp\u003e12 mm 86° coma-correcting eyepiece for Newtonian telescopes.\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eWell-corrected ultra-wide\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e86° field with sharp star images\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eacross the field even with fast f\/3 Newtonian optics\u003c\/li\u003e\n\u003cli\u003eComfortable\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e19 mm eye relief\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith foldable rubber eyecup\u003c\/li\u003e\n\u003cli\u003eMulti-coated optics combined with high transmission glass types and blackened lens edges for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esuperb contrast\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat field\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erequiring less than 0.7 diopters of accommodation across the field\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow distortion\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edelivering constant magnification across the field\u003c\/li\u003e\n\u003cli\u003eHandy size and weight with comfortable rubber grips\u003c\/li\u003e\n\u003cli\u003eFilter-threaded\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebarrel with safety kerfs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethat do not lock, slip, or tilt in the focuser\u003c\/li\u003e\n\u003cli\u003eEyepiece cap with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eglow in the dark focal length\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRead more about\u003cspan\u003e \u003c\/span\u003e\u003ca data-jwlink-type=\"page\" data-jwlink-identifier=\"24821286\" data-jwlink-title=\"Benefits of Coma-Correcting Eyepieces\" href=\"https:\/\/www.houdinitelescopes.com\/benefits-of-coma-correcting-eyepieces\"\u003ethe benefits of coma-correcting eyepieces\u003c\/a\u003e.\u003c\/p\u003e\n\u003cdiv id=\"jw-element-545760045\" data-jw-element-id=\"545760045\" class=\"jw-tree-node jw-element jw-image-text\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eHoudini Eyepiece Performance\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"jw-element-545768808\" data-jw-element-id=\"545768808\" class=\"jw-tree-node jw-element jw-image-text\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\" style=\"text-align: start;\"\u003e\n\u003cp\u003eThe following graph illustrates the performance of the Houdini eyepieces in a F\/4 Newtonian telescope. Spot diagrams  with 3,000 rays are shown\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eat the center, halfway, and near the edge of the field.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe spots have been\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003estrongly\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003emagnified to show them clearly. In the center of the field a spot diagram smaller than 2' is almost perfect, at the edge a spot diagram smaller than 10' is considered excellent. The top left shows 2' and 5' circles.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere is no trace of coma left in the Houdini spot diagrams. Some spherical aberration and some lateral color remain, which shows on very bright objects, such as a magnitude 1 star or Jupiter, at the edge of the field. This is not visible at all in a typical deep sky field that does not contain magnitude 1 stars. Such a field will appear essentially sharp from edge to edge.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/houdini-comparison-chart-20-12-7-30-high-st92yh_1024x1024.webp?v=1778881755\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"jw-element-417947655\" data-jw-element-id=\"417947655\" class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eWill it work in my telescope?\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"jw-element-417947656\" data-jw-element-id=\"417947656\" class=\"jw-tree-node jw-element jw-image-text jw-node-is-last-child\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003cp\u003e\u003cspan\u003eThe Houdini eyepieces were designed for Newtonian telescopes with parabolic mirrors, but they will also work well with any telescope with a focal ratio of f\/6 or slower (f\/8, f\/10, etc.). This includes slow refractors and most popular Schmidt-Cassegrain telescopes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe eyepiece is not recommended for use with fast telescope systems without parabolic mirror, such as f\/5 APO refractors.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2\u003e12mm 86° Coma-Correcting Eyepiece\u003c\/h2\u003e\n\u003ctable class=\"jw-table jw-table--style-striped jw-table--size-medium\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"50%\"\u003eFocal length\u003c\/td\u003e\n\u003ctd width=\"50%\"\u003e12 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent field of view\u003c\/td\u003e\n\u003ctd\u003e86°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField stop\u003c\/td\u003e\n\u003ctd\u003e18.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLayout\u003c\/td\u003e\n\u003ctd\u003e9 elements in 7 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTheoretical eye relief (center of field, to glass)\u003c\/td\u003e\n\u003ctd\u003e19 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUseful eye relief (edge of field, to body)\u003c\/td\u003e\n\u003ctd\u003e15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. diameter\u003c\/td\u003e\n\u003ctd\u003e51 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall height including eyecup\u003c\/td\u003e\n\u003ctd\u003e121 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel length\u003c\/td\u003e\n\u003ctd\u003e34 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e330 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel\u003c\/td\u003e\n\u003ctd\u003e1.25 inch (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal point\u003c\/td\u003e\n\u003ctd\u003e0.5 mm below barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField flatness\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5 diopters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAngular magnification distortion\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEAN\u003c\/td\u003e\n\u003ctd\u003e05419980565815\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003ch2\u003eHoudini Eyepiece Specifications\u003c\/h2\u003e\n\u003cdiv id=\"jw-element-545759494\" data-jw-element-id=\"545759494\" class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ctable class=\"jw-table jw-table--header jw-table--style-striped jw-table--size-medium\" width=\"100%\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth width=\"12%\"\u003eEyepiece\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eFocal Length mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eAFOV °\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eField Stop mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eLayout\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eEye Relief mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eWeight g\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eDiameter mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eHeight mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eBarrel\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eBarrel Length mm\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eFocal Point mm\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eFlatness diopter\u003c\/th\u003e\n\u003cth width=\"9%\"\u003eAngular Magnification Distortion\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"12%\"\u003eHoudini 30*\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e30\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e80\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e42.0\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e580\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e64.5\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e140\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e2\"\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e38\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e+2\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd width=\"9%\"\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e30.0\u003c\/td\u003e\n\u003ctd\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd\u003e570\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003ctd\u003e140\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003ctd\u003e35\u003c\/td\u003e\n\u003ctd\u003e+2\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 12\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e18.0\u003c\/td\u003e\n\u003ctd\u003e9 \/ 7\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e330\u003c\/td\u003e\n\u003ctd\u003e51\u003c\/td\u003e\n\u003ctd\u003e121\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 9*\u003c\/td\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e13.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e48.5\u003c\/td\u003e\n\u003ctd\u003e127\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 7\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e290\u003c\/td\u003e\n\u003ctd\u003e47\u003c\/td\u003e\n\u003ctd\u003e129\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eAFOV = Apparent Field of View\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eLayout: Number of Elements \/ Number of Groups\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eEye Relief: Theoretical Eye Relief (center of field, to glass) \/ Effective Eye Relief (edge of field, to body)\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eDiameter: Maximum diameter of the aluminum body - the rubber grips add around 1 mm to the diameter\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eHeight: Includes the height of the eyecup\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eBarrel: Standard size 2\" = 50.8 mm or 1.25\" = 31.75 mm\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eFocal Point: Position of the focal plane with respect to the barrel. Positive values are above and negative values are below the top of the barrel\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e12 mm 86° Coma-Correcting Eyepiece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/istronomyplus.com\/pages\/houdini-warranty\" target=\"_blank\"\u003eHoudini limited lifetime Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Houdini","offers":[{"title":"Default Title","offer_id":49062092407013,"sku":"HOU-CC12","price":527.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/H12-1.png?v=1778883745"},{"product_id":"houdini-9-mm-86-coma-correcting-eyepiece-cc9","title":"Houdini 9 mm 86° Coma-Correcting Eyepiece (CC9)","description":"\u003ch1\u003eHoudini 9 mm 86° Coma-Correcting Eyepiece\u003c\/h1\u003e\n\u003cp\u003e9 mm 86° coma-correcting eyepiece for Newtonian telescopes.\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eWell-corrected ultra-wide\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e86° field with sharp star images\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eacross the field even with fast f\/3 Newtonian optics\u003c\/li\u003e\n\u003cli\u003eComfortable\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e19 mm eye relief\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith foldable rubber eyecup\u003c\/li\u003e\n\u003cli\u003eMulti-coated optics combined with high transmission glass types and blackened lens edges for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esuperb contrast\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat field\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erequiring less than 0.5 diopters of accommodation across the field\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow distortion\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edelivering constant magnification across the field\u003c\/li\u003e\n\u003cli\u003eHandy size and weight with comfortable rubber grips\u003c\/li\u003e\n\u003cli\u003eFilter-threaded\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebarrel with safety kerfs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethat do not lock, slip, or tilt in the focuser\u003c\/li\u003e\n\u003cli\u003eEyepiece cap with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eglow in the dark focal length\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRead more about\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.houdinitelescopes.com\/benefits-of-coma-correcting-eyepieces\" data-jwlink-title=\"Benefits of Coma-Correcting Eyepieces\" data-jwlink-identifier=\"24821286\" data-jwlink-type=\"page\"\u003ethe benefits of coma-correcting eyepieces\u003c\/a\u003e.\u003c\/p\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text\" data-jw-element-id=\"545760045\" id=\"jw-element-545760045\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eHoudini Eyepiece Performance\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text\" data-jw-element-id=\"545768808\" id=\"jw-element-545768808\"\u003e\n\u003cdiv style=\"text-align: start;\" class=\"jw-element-imagetext-text\"\u003e\n\u003cp\u003eThe following graph illustrates the performance of the Houdini eyepieces in a F\/4 Newtonian telescope. Spot diagrams  with 3,000 rays are shown\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eat the center, halfway, and near the edge of the field.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe spots have been\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003estrongly\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003emagnified to show them clearly. In the center of the field a spot diagram smaller than 2' is almost perfect, at the edge a spot diagram smaller than 10' is considered excellent. The top left shows 2' and 5' circles.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere is no trace of coma left in the Houdini spot diagrams. Some spherical aberration and some lateral color remain, which shows on very bright objects, such as a magnitude 1 star or Jupiter, at the edge of the field. This is not visible at all in a typical deep sky field that does not contain magnitude 1 stars. Such a field will appear essentially sharp from edge to edge.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/houdini-comparison-chart-20-12-7-30-high-st92yh_1024x1024.webp?v=1778881755\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\" data-jw-element-id=\"417947655\" id=\"jw-element-417947655\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eWill it work in my telescope?\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-last-child\" data-jw-element-id=\"417947656\" id=\"jw-element-417947656\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003cp\u003e\u003cspan\u003eThe Houdini eyepieces were designed for Newtonian telescopes with parabolic mirrors, but they will also work well with any telescope with a focal ratio of f\/6 or slower (f\/8, f\/10, etc.). This includes slow refractors and most popular Schmidt-Cassegrain telescopes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe eyepiece is not recommended for use with fast telescope systems without parabolic mirror, such as f\/5 APO refractors.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2\u003e9mm 86° Coma-Correcting Eyepiece\u003c\/h2\u003e\n\u003ctable width=\"100%\" class=\"jw-table jw-table--style-striped jw-table--size-medium\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"50%\"\u003eFocal length\u003c\/td\u003e\n\u003ctd width=\"50%\"\u003e9 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent field of view\u003c\/td\u003e\n\u003ctd\u003e86°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField stop\u003c\/td\u003e\n\u003ctd\u003e13.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLayout\u003c\/td\u003e\n\u003ctd\u003e9 elements in 6 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTheoretical eye relief (center of field, to glass)\u003c\/td\u003e\n\u003ctd\u003e19 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUseful eye relief (edge of field, to body)\u003c\/td\u003e\n\u003ctd\u003e15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. diameter\u003c\/td\u003e\n\u003ctd\u003e48.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall height including eyecup\u003c\/td\u003e\n\u003ctd\u003e127 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel length\u003c\/td\u003e\n\u003ctd\u003e31 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e300 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel\u003c\/td\u003e\n\u003ctd\u003e1.25 inch (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal point\u003c\/td\u003e\n\u003ctd\u003e0.5 mm below barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField flatness\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5 diopters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAngular magnification distortion\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEAN\u003c\/td\u003e\n\u003ctd\u003e05419980565839\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003ch2\u003eHoudini Eyepiece Specifications\u003c\/h2\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\" data-jw-element-id=\"545759494\" id=\"jw-element-545759494\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ctable width=\"100%\" class=\"jw-table jw-table--header jw-table--style-striped jw-table--size-medium\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth width=\"12%\"\u003eEyepiece\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eFocal Length mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eAFOV °\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eField Stop mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eLayout\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eEye Relief mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eWeight g\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eDiameter mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eHeight mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eBarrel\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eBarrel Length mm\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eFocal Point mm\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eFlatness diopter\u003c\/th\u003e\n\u003cth width=\"9%\"\u003eAngular Magnification Distortion\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"12%\"\u003eHoudini 30*\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e30\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e80\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e42.0\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e580\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e64.5\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e140\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e2\"\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e38\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e+2\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd width=\"9%\"\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e30.0\u003c\/td\u003e\n\u003ctd\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd\u003e570\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003ctd\u003e140\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003ctd\u003e35\u003c\/td\u003e\n\u003ctd\u003e+2\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 12\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e18.0\u003c\/td\u003e\n\u003ctd\u003e9 \/ 7\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e330\u003c\/td\u003e\n\u003ctd\u003e51\u003c\/td\u003e\n\u003ctd\u003e121\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 9*\u003c\/td\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e13.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e48.5\u003c\/td\u003e\n\u003ctd\u003e127\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 7\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e290\u003c\/td\u003e\n\u003ctd\u003e47\u003c\/td\u003e\n\u003ctd\u003e129\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eAFOV = Apparent Field of View\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eLayout: Number of Elements \/ Number of Groups\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eEye Relief: Theoretical Eye Relief (center of field, to glass) \/ Effective Eye Relief (edge of field, to body)\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eDiameter: Maximum diameter of the aluminum body - the rubber grips add around 1 mm to the diameter\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eHeight: Includes the height of the eyecup\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eBarrel: Standard size 2\" = 50.8 mm or 1.25\" = 31.75 mm\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eFocal Point: Position of the focal plane with respect to the barrel. Positive values are above and negative values are below the top of the barrel\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e9 mm 86° Coma-Correcting Eyepiece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/houdini-warranty\" rel=\"noopener\" target=\"_blank\"\u003eHoudini limited lifetime Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Houdini","offers":[{"title":"Default Title","offer_id":49062102040805,"sku":"HOU-CC9","price":514.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/H9-1.png?v=1778884321"},{"product_id":"houdini-7-mm-86-coma-correcting-eyepiece-cc7","title":"Houdini 7 mm 86° Coma-Correcting Eyepiece (CC7)","description":"\u003ch1\u003eHoudini 7 mm 86° Coma-Correcting Eyepiece\u003c\/h1\u003e\n\u003cp\u003e7 mm 86° coma-correcting eyepiece for Newtonian telescopes.\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eWell-corrected ultra-wide\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e86° field with sharp star images\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eacross the field even with fast f\/3 Newtonian optics\u003c\/li\u003e\n\u003cli\u003eComfortable\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e19 mm eye relief\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith foldable rubber eyecup\u003c\/li\u003e\n\u003cli\u003eMulti-coated optics combined with high transmission glass types and blackened lens edges for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esuperb contrast\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat field\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erequiring less than 0.7 diopters of accommodation across the field\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow distortion\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edelivering constant magnification across the field\u003c\/li\u003e\n\u003cli\u003eHandy size and weight with comfortable rubber grips\u003c\/li\u003e\n\u003cli\u003eFilter-threaded\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebarrel with safety kerfs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethat do not lock, slip, or tilt in the focuser\u003c\/li\u003e\n\u003cli\u003eEyepiece cap with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eglow in the dark focal length\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text\" data-jw-element-id=\"545760045\" id=\"jw-element-545760045\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eHoudini Eyepiece Performance\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text\" data-jw-element-id=\"545768808\" id=\"jw-element-545768808\"\u003e\n\u003cdiv style=\"text-align: start;\" class=\"jw-element-imagetext-text\"\u003e\n\u003cp\u003eThe following graph illustrates the performance of the Houdini eyepieces in a F\/4 Newtonian telescope. Spot diagrams  with 3,000 rays are shown\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eat the center, halfway, and near the edge of the field.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe spots have been\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003estrongly\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003emagnified to show them clearly. In the center of the field a spot diagram smaller than 2' is almost perfect, at the edge a spot diagram smaller than 10' is considered excellent. The top left shows 2' and 5' circles.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere is no trace of coma left in the Houdini spot diagrams. Some spherical aberration and some lateral color remain, which shows on very bright objects, such as a magnitude 1 star or Jupiter, at the edge of the field. This is not visible at all in a typical deep sky field that does not contain magnitude 1 stars. Such a field will appear essentially sharp from edge to edge.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/houdini-comparison-chart-20-12-7-30-high-st92yh_1024x1024.webp?v=1778881755\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\" data-jw-element-id=\"417947655\" id=\"jw-element-417947655\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eWill it work in my telescope?\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-last-child\" data-jw-element-id=\"417947656\" id=\"jw-element-417947656\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003cp\u003e\u003cspan\u003eThe Houdini eyepieces were designed for Newtonian telescopes with parabolic mirrors, but they will also work well with any telescope with a focal ratio of f\/6 or slower (f\/8, f\/10, etc.). This includes slow refractors and most popular Schmidt-Cassegrain telescopes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe eyepiece is not recommended for use with fast telescope systems without parabolic mirror, such as f\/5 APO refractors.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2\u003e7mm 86° Coma-Correcting Eyepiece\u003c\/h2\u003e\n\u003ctable class=\"jw-table jw-table--style-striped jw-table--size-medium\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"50%\"\u003eFocal length\u003c\/td\u003e\n\u003ctd width=\"50%\"\u003e7 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent field of view\u003c\/td\u003e\n\u003ctd\u003e86°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField stop\u003c\/td\u003e\n\u003ctd\u003e10.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLayout\u003c\/td\u003e\n\u003ctd\u003e9 elements in 6 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTheoretical eye relief (center of field, to glass)\u003c\/td\u003e\n\u003ctd\u003e19 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUseful eye relief (edge of field, to body)\u003c\/td\u003e\n\u003ctd\u003e15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. diameter\u003c\/td\u003e\n\u003ctd\u003e47 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall height including eyecup\u003c\/td\u003e\n\u003ctd\u003e129 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel length\u003c\/td\u003e\n\u003ctd\u003e30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e290 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel\u003c\/td\u003e\n\u003ctd\u003e1.25 inch (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal point\u003c\/td\u003e\n\u003ctd\u003e0.5 mm below barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField flatness\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5 diopters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAngular magnification distortion\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEAN\u003c\/td\u003e\n\u003ctd\u003e05419980565822\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003ch2\u003eHoudini Eyepiece Specifications\u003c\/h2\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\" data-jw-element-id=\"545759494\" id=\"jw-element-545759494\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ctable width=\"100%\" class=\"jw-table jw-table--header jw-table--style-striped jw-table--size-medium\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth width=\"12%\"\u003eEyepiece\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eFocal Length mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eAFOV °\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eField Stop mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eLayout\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eEye Relief mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eWeight g\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eDiameter mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eHeight mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eBarrel\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eBarrel Length mm\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eFocal Point mm\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eFlatness diopter\u003c\/th\u003e\n\u003cth width=\"9%\"\u003eAngular Magnification Distortion\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"12%\"\u003eHoudini 30*\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e30\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e80\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e42.0\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e580\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e64.5\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e140\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e2\"\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e38\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e+2\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd width=\"9%\"\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e30.0\u003c\/td\u003e\n\u003ctd\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd\u003e570\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003ctd\u003e140\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003ctd\u003e35\u003c\/td\u003e\n\u003ctd\u003e+2\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 12\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e18.0\u003c\/td\u003e\n\u003ctd\u003e9 \/ 7\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e330\u003c\/td\u003e\n\u003ctd\u003e51\u003c\/td\u003e\n\u003ctd\u003e121\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 9*\u003c\/td\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e13.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e48.5\u003c\/td\u003e\n\u003ctd\u003e127\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 7\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e290\u003c\/td\u003e\n\u003ctd\u003e47\u003c\/td\u003e\n\u003ctd\u003e129\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eAFOV = Apparent Field of View\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eLayout: Number of Elements \/ Number of Groups\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eEye Relief: Theoretical Eye Relief (center of field, to glass) \/ Effective Eye Relief (edge of field, to body)\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eDiameter: Maximum diameter of the aluminum body - the rubber grips add around 1 mm to the diameter\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eHeight: Includes the height of the eyecup\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eBarrel: Standard size 2\" = 50.8 mm or 1.25\" = 31.75 mm\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eFocal Point: Position of the focal plane with respect to the barrel. Positive values are above and negative values are below the top of the barrel\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e7 mm 86° Coma-Correcting Eyepiece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/houdini-warranty\" rel=\"noopener\" target=\"_blank\"\u003eHoudini limited lifetime Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Houdini","offers":[{"title":"Default Title","offer_id":49062118916325,"sku":"HOU-CC7","price":498.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/H7-1.png?v=1778884556"},{"product_id":"houdini-coma-correcting-eyepiece-starter-set-ccset","title":"Houdini Coma-Correcting Eyepiece Starter Set 20, 12 \u0026 7mm (CCSET)","description":"\u003ch1\u003eHoudini Coma-Correcting Eyepiece Starter Set 20, 12 \u0026amp; 7mm \u003c\/h1\u003e\n\u003cp\u003eSet of three coma-correcting 20 mm, 12 mm and 7 mm eyepieces. The perfect starter package for any Newtonian telescope owner, with three of the most used eyepiece focal lengths.\u003c\/p\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text\" data-jw-element-id=\"545760045\" id=\"jw-element-545760045\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eHoudini Eyepiece Performance\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text\" data-jw-element-id=\"545768808\" id=\"jw-element-545768808\"\u003e\n\u003cdiv style=\"text-align: start;\" class=\"jw-element-imagetext-text\"\u003e\n\u003cp\u003eThe following graph illustrates the performance of the Houdini eyepieces in a F\/4 Newtonian telescope. Spot diagrams  with 3,000 rays are shown\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eat the center, halfway, and near the edge of the field.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe spots have been\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003estrongly\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003emagnified to show them clearly. In the center of the field a spot diagram smaller than 2' is almost perfect, at the edge a spot diagram smaller than 10' is considered excellent. The top left shows 2' and 5' circles.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere is no trace of coma left in the Houdini spot diagrams. Some spherical aberration and some lateral color remain, which shows on very bright objects, such as a magnitude 1 star or Jupiter, at the edge of the field. This is not visible at all in a typical deep sky field that does not contain magnitude 1 stars. Such a field will appear essentially sharp from edge to edge.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/houdini-comparison-chart-20-12-7-30-high-st92yh_1024x1024.webp?v=1778881755\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eWill it work in my telescope?\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe Houdini eyepieces were designed for Newtonian telescopes with parabolic mirrors, but they will also work well with any telescope with a focal ratio of f\/6 or slower (f\/8, f\/10, etc.). This includes slow refractors and most popular Schmidt-Cassegrain telescopes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe eyepiece is not recommended for use with fast telescope systems without parabolic mirror, such as f\/5 APO refractors.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2\u003eHoudini Eyepiece Specifications\u003c\/h2\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\" data-jw-element-id=\"545759494\" id=\"jw-element-545759494\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ctable width=\"100%\" class=\"jw-table jw-table--header jw-table--style-striped jw-table--size-medium\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth width=\"12%\"\u003eEyepiece\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eFocal Length mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eAFOV °\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eField Stop mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eLayout\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eEye Relief mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eWeight g\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eDiameter mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eHeight mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eBarrel\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eBarrel Length mm\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eFocal Point mm\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eFlatness diopter\u003c\/th\u003e\n\u003cth width=\"9%\"\u003eAngular Magnification Distortion\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"12%\"\u003eHoudini 30*\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e30\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e80\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e42.0\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e580\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e64.5\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e140\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e2\"\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e38\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e+2\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd width=\"9%\"\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e30.0\u003c\/td\u003e\n\u003ctd\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd\u003e570\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003ctd\u003e140\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003ctd\u003e35\u003c\/td\u003e\n\u003ctd\u003e+2\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 12\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e18.0\u003c\/td\u003e\n\u003ctd\u003e9 \/ 7\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e330\u003c\/td\u003e\n\u003ctd\u003e51\u003c\/td\u003e\n\u003ctd\u003e121\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 9*\u003c\/td\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e13.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e48.5\u003c\/td\u003e\n\u003ctd\u003e127\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 7\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e290\u003c\/td\u003e\n\u003ctd\u003e47\u003c\/td\u003e\n\u003ctd\u003e129\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eAFOV = Apparent Field of View\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eLayout: Number of Elements \/ Number of Groups\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eEye Relief: Theoretical Eye Relief (center of field, to glass) \/ Effective Eye Relief (edge of field, to body)\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eDiameter: Maximum diameter of the aluminum body - the rubber grips add around 1 mm to the diameter\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eHeight: Includes the height of the eyecup\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eBarrel: Standard size 2\" = 50.8 mm or 1.25\" = 31.75 mm\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eFocal Point: Position of the focal plane with respect to the barrel. Positive values are above and negative values are below the top of the barrel\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e7 mm 86° Coma-Correcting Eyepiece\u003c\/li\u003e\n\u003cli\u003e12 mm 86° Coma-Correcting Eyepiece\u003c\/li\u003e\n\u003cli\u003e20 mm 86° Coma-Correcting Eyepiece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/houdini-warranty\" rel=\"noopener\" target=\"_blank\"\u003eHoudini limited lifetime Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Houdini","offers":[{"title":"Default Title","offer_id":49090178121957,"sku":"HOU-CCSET","price":1487.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_18484779-1273-466f-b729-a87dfa210b57.png?v=1779216862"},{"product_id":"explore-scientific-hr-variable-coma-corrector-2-inch-hrcc02-00-copy","title":"Explore Scientific HR Variable Coma Corrector (2-inch) (HRCC02-01)","description":"\u003ch1\u003eExplore Scientific HR Variable Coma Corrector (2-inch)\u003c\/h1\u003e\n\u003cp\u003eThis model does not come with the adapters that allow for a direct screw-on connection to a camera. It can be used with a camera by using a 2-inch to 1.25-inch adapter, SKU \u003cspan\u003e\u003ca title=\"510365\" href=\"https:\/\/explorescientificusa.com\/products\/explore-scientific-50mm-2-t2-camera-adapter?variant=644627267600\"\u003e510365\u003c\/a\u003e, and the appropriate T2 adapter for your camera.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eAfter hours at the eyepiece, you finally get to view the fruits of your astrophotography labors. The stars in the center of the field pop like brilliant precise points of light. But as you survey the image, you notice the stars at the edge have taken on an unnatural comet-like shape. Your long night has been marred by coma. Coma is a common plague of the Newtonian reflector design, and its annoying presence at the outskirts of an image can be a bane for astronomers of all levels.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eExplore Scientific’s HR Variable Coma Corrector is a high-performance optical corrector designed by world famous optical designer Harrie Rutten, and it will help you minimize or even eliminate image aberrations caused by this off-axis optical phenomenon even in fast Newtonians. This 2-inch coma corrector with is EMC Coated to reduce internal reflections and its spacer with markings allow you to use the device on almost any Newtonian telescope with a parabolic primary mirror, even fast Newtonians such as the\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/explorescientificusa.com\/products\/coma-corrector\"\u003eBRESSER N20839 f\/3.9 Photo Newtonian\u003c\/a\u003e. \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003e protective cap.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eItem Number\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"speccell\"\u003eHRCC02-01\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eWeight\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"speccell\"\u003e1lb; .45kg\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eDiameter\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"speccell\"\u003e69.3mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eHeight\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"speccell\"\u003e147.2mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell\"\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003ch3 class=\"spanrow\"\u003e\u003cspan class=\"speccell\"\u003eIn the Box\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eExplore Scientific HR Variable Coma Corrector (2-inch) (HRCC02-01)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"speccell\"\u003eWarranty\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan class=\"speccell\"\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/explore-scientific-warranty\"\u003eExplore Scientific 1-Year Warranty (You need to register)\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":51363868377317,"sku":"ES-HRCC02-01","price":280.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/HRCC02-00_1_57f89e7a-03ee-46e8-b2ee-7841ed531341.webp?v=1785947665"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/collections\/2-mpcc-mark-iii-multi-purpose-coma-corrector-for-newtons-d28__76708.jpg?v=1743089059","url":"https:\/\/istronomyplus.com\/collections\/coma-correctors.oembed","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}