{"title":"Cheshire","description":"","products":[{"product_id":"howie-glatter-tublug-1-25-newtonian-collimator-si-tublug1-25","title":"Howie Glatter TuBlug 1.25\" Newtonian Collimator (SI-TUBLUG1.25)","description":"\u003ch2\u003eHowie Glatter TuBlug 1.25\" Newtonian Collimator\u003c\/h2\u003e\n\u003cp\u003eUse the Howie Glatter TuBlug 1.25\" with a regular laser collimator in single beam mode to perform barlowed laser Newtonian primary mirror alignment on closed tube reflectors. The Howie Glatter TuBlug is inserted into the focusers' draw tube in which the laser collimator then attaches to the otherside of the TuBLUG Matte-white 45 degree face and anti-reflection coated Barlow lens mounted in a central axial hole. The Howie Glatter TuBlug is easily visible from primary adjustment position and can be turned 180 degrees to face the front and has a cut-out.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse with a regular laser collimator in single beam mode to perform barlowed laser Newtonian primary mirror alignment on closed tube reflectors.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe Howie Glatter TuBLUG is inserted into the focuser in which the laser collimator then attaches to the otherside of the TuBLUG\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMatte-white 45 degree face and anti-reflection coated Barlow lens mounted in a central axial hole.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe Howie Glatter TuBLUG is easily visible from primary adjustment position and can be turned 180 degrees to face the front and has a cut-out.\u003c\/li\u003e\n\u003c\/ul\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\"\u003eHowie Glatter TuBlug 1.25\" Newtonian Collimator\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cdiv class=\"entry-content\"\u003e\n\u003cp\u003eHowie Glatter Limited Lifetime Warranty\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/The-Howie-Glatter-TuBlug.pdf?v=1668194228\" title=\"Collimator Instructions\" target=\"_blank\"\u003eUser Instructions\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":43125746925797,"sku":"HG-SI-TUBLUG1.25","price":224.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/howie-glatter-tublug-1-25-newtonian-collimator-si-tublug1-25-astronomy-plus.webp?v=1690484504"},{"product_id":"celestron-1-25-collimation-eyepiece-94182","title":"Celestron 1.25\" Collimation Eyepiece (94182)","description":"\u003ch1\u003eCelestron 1.25\" Collimation Eyepiece\u003c\/h1\u003e\n\u003cp\u003eThe Celestron Cheshire Eyepiece is ideal for precise collimation of Newtonians and helpful for aligning Schmidt-Cassegrains. This special eyepiece fits into 1.25\" focusers or diagonals.\u003c\/p\u003e\n\u003cp\u003eAlignment is easy using the small opening on one end and thin cross-hairs at the other end. The collimation eyepiece is more accurate than the simple Collimation Tool.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe Celestron Cheshire Collimation Eyepiece is ideal for precise collimation of Newtonians and helpful for aligning Schmidt-Cassegrains\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCelestron 1.25\" Collimation Eyepiece\u003cbr\u003e\n\u003c\/li\u003e\n\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","brand":"Celestron","offers":[{"title":"Default Title","offer_id":43125765013733,"sku":"CEL-94182","price":49.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/celestron-1-25-collimation-eyepiece-94182-astronomy-plus_c16c0102-e5db-4211-89cd-8b5731092d2e.png?v=1690484937"},{"product_id":"antares-1-25-cheshire-collimator-rn","title":"Antares 1.25\" Cheshire Collimator (RN)","description":"\u003ch2\u003eAntares 1.25\" Cheshire Collimator\u003c\/h2\u003e\n\u003cp\u003eAlign your optics with a prescision Antares 1.25\" Cheshire Collimator. An absolute must for Aspheric system performance.  \u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"Polaris-Badge_2qgie\"\u003e\u003cspan class=\"Polaris-Text--root_yj4ah Polaris-Text--bodySm_nvqxj Polaris-Text--regular_pjgr0\"\u003e'-Please note that we do not accept returns for collimation tools. We will only accept exchange for another collimation tool.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"woocommerce-product-details__short-description\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\nAntares 1.25\" Cheshire Collimator\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"woocommerce-product-details__short-description\"\u003e\n\u003cbr\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"value\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntares 1-Year Warranty\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Antares","offers":[{"title":"Default Title","offer_id":43760356917477,"sku":"ANT-RN","price":48.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/antares-1-25-cheshire-collimator-rn-astronomy-plus.webp?v=1690486228"},{"product_id":"astronomy-plus-1-25-cheshire-collimator-ta12","title":"Astronomy Plus 1.25\" Cheshire Collimator (TA12)","description":"\u003ch1\u003eAstronomy Plus 1.25\" Cheshire Collimator\u003c\/h1\u003e\n\u003cp\u003eA Cheshire collimating eyepiece is a precision tool used to align the optical elements of a telescope, ensuring sharp and accurate views.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eIt is particularly useful for Newtonian telescopes, where it helps align the primary and secondary mirrors, and can also aid in verifying collimation in Schmidt-Cassegrain telescopes. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eBy using a sight tube, a central peephole, and a crosshair, it allows users to fine-tune mirror alignment without relying on external light sources.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specification\u003c\/h3\u003e\n\u003ctable cellspacing=\"0\" border=\"0\"\u003e\n\u003ccolgroup span=\"2\" width=\"85\"\u003e\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd height=\"17\" align=\"center\"\u003eFitting\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e1.25’’\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\u003cp\u003e1.25\" Cheshire Collimator (TA12)\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cdiv\u003e\u003ca href=\"https:\/\/istronomyplus.com\/products\/astronomy-plus-usb-dew-heater?_pos=5\u0026amp;_sid=79711b5af\u0026amp;_ss=r\" target=\"_blank\" rel=\"noopener\"\u003e1-Year Astronomy Plus Warranty\u003c\/a\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Astronomy Plus","offers":[{"title":"Default Title","offer_id":46585967608037,"sku":"AP-TA12","price":26.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/IMG_20250313_135939_450.jpg?v=1777043594"},{"product_id":"svbony-1-25-cheshire-collimating-eyepiece-w9154a","title":"SVBONY 1.25'' Cheshire Collimating Eyepiece (W9154A)","description":"\u003ch1 class=\"product-single__title\"\u003eSVBONY SV197 1.25'' Cheshire Collimating Eyepiece\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eSV197 cheshire collimating eyepiece fits for Newtonian and SCT reflector telescopes; also useful for aligning refractor optics very accurately;\u003c\/li\u003e\n\u003cli\u003eThe SV197 cheshire collimating eyepiece for accurate alignment of any Newtonian reflector telescope mirrors; ideal for ensuring the optical alignment;\u003c\/li\u003e\n\u003cli\u003ePeephole in top; The SV197 cheshire collimating eyepiece can directly see the result of the calibration;\u003c\/li\u003e\n\u003cli\u003ePrecision machined from aluminium with fine crosshairs and a clear bright mirror with sighting hole;\u003c\/li\u003e\n\u003cli\u003eEasy alignment; no batteries needed; for secondary mirror collimation; can be used only during the day;\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThe SV197 cheshire collimating eyepiece for accurate alignment of any Newtonian reflector telescope mirrors; ideal for ensuring the optical alignment\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eMade of high-quality aluminum material. Anti-rust, wear-resistant, and durable. \u003c\/span\u003e\u003cspan\u003eCNC precision manufacturing, oxidation black, steel cross wire. the crosshairs are clearer and easier to use.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe inner structure can reduce light reflection to improve the clearness of view.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCollimation eyepiece is more accurate than the normal collimation tool, can help you better enjoy star watching-fun. Suitable for Newtonian Telescopes.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/6385872182173339519705406_1024x1024.jpg?v=1747936926\" alt=\"\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003ch2\u003eFits in 1.25 inch focusers\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eSV197 cheshire collimating eyepiece can be inserted into 1.25 inch focusers or diagonals.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/6385872220150846934210861_1024x1024.jpg?v=1747936968\"\u003e\u003c\/div\u003e\n\u003ch2\u003eMore Accurate than the Normal Collimation Tool\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eCollimation eyepiece is more accurate than the normal collimation tool, can help you better enjoy star watching-fun. Suitable for Newtonian Telescopes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/6385872222945862758631936_1024x1024.jpg?v=1747937013\"\u003e\u003c\/div\u003e\n\u003ch2\u003eHow To Collimate Telescope With Cheshire Eyepiece:\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe view through the Cheshire eyepiece during the collimation will differ between telescopes. For fast telescopes (f5 and below), it will be little off-center, and for the slow telescopes (f5 and above), the view will be more centered and easier to collimate.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e1.The goal here is to center the primary mirror reflection in the secondary mirror and reflection from the Cheshire with the secondary mirror.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e2.To achieve that, you have to use the adjustment screws on the secondary and primary mirrors while looking through the Cheshire eyepiece collimator tool.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSV197\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e156g\/5.51oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit Size\u003c\/td\u003e\n\u003ctd\u003e1.25''(31.75mm) \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial of Crosshairs  \u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody Material and Processing\u003c\/td\u003e\n\u003ctd\u003eAluminum \u0026amp; CNC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimension\u003c\/td\u003e\n\u003ctd\u003e141×41×32mm\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\u003cp\u003e1.25'' Cheshire Collimating Eyepiece (W9154A)\u003c\/p\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/svbony-warranty\" target=\"_blank\"\u003eSvbony 1-Year Warranty\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Svbony","offers":[{"title":"Default Title","offer_id":46781599318245,"sku":"SVB-W9154A","price":36.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_b8ecd8de-2d84-42e4-8633-ae3aae0641ea.jpg?v=1777043678"},{"product_id":"astronomy-plus-telescope-collimation-eyepiece-long-style-ta13","title":"Astronomy Plus Chesire Telescope Collimation Eyepiece (long style) (TA13)","description":"\u003ch1 data-end=\"515\" data-start=\"174\"\u003eAstronomy Plus Chesire Telescope Collimation Eyepiece (long style)\u003c\/h1\u003e\n\u003cp data-end=\"515\" data-start=\"174\"\u003e \u003c\/p\u003e\n\u003cp data-end=\"515\" data-start=\"174\"\u003eThis \u003cstrong data-end=\"204\" data-start=\"179\"\u003elong-style collimator\u003c\/strong\u003e is a precision alignment tool designed for Newtonian and Dobsonian telescopes, offering enhanced visibility and accuracy thanks to its extended length. Crafted from \u003cstrong data-end=\"395\" data-start=\"370\"\u003eCNC-machined aluminum\u003c\/strong\u003e, it provides a robust and lightweight solution for telescope collimation without the need for batteries or electronics.\u003c\/p\u003e\n\u003cp data-end=\"949\" data-start=\"517\"\u003eIdeal for both beginners and experienced astronomers, this tool typically functions as a \u003cstrong data-end=\"633\" data-start=\"606\"\u003eCheshire-style eyepiece\u003c\/strong\u003e or combination sight tube and Cheshire, giving you clear visual cues to align your secondary and primary mirrors. The longer body increases sighting accuracy by offering a more stable optical axis and better alignment reference, especially useful on telescopes with longer focal lengths or larger secondary mirrors.\u003c\/p\u003e\n\u003cp data-end=\"1324\" data-start=\"951\"\u003eThe internal reflective surface and central peephole allow precise collimation using ambient light, while the durable aluminum construction ensures long-lasting performance in the field or observatory. Whether you're star-testing or preparing for a high-power planetary session, this tool helps you achieve the \u003cstrong data-end=\"1289\" data-start=\"1262\"\u003esharpest possible image\u003c\/strong\u003e through careful optical alignment.\u003c\/p\u003e\n\u003cp data-end=\"1414\" data-start=\"1326\"\u003eA must-have for serious observers who value mechanical simplicity and optical precision.\u003c\/p\u003e\n\u003cp data-end=\"1414\" data-start=\"1326\"\u003e \u003c\/p\u003e\n\u003ch3 data-end=\"1414\" data-start=\"1326\"\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eAstronomy Plus Telescope Collimation Eyepiece (long style)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/astronomy-plus-warranty\" rel=\"noopener\" target=\"_blank\"\u003eAstronomy Plus Warranty\u003c\/a\u003e\u003c\/p\u003e","brand":"Astronomy Plus","offers":[{"title":"Default Title","offer_id":47030602498277,"sku":"AP-TA13","price":30.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_919098c0-a88a-4163-95de-fd451c98618d.webp?v=1751659306"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/collections\/cheshire-astronomy-plus.png?v=1677340884","url":"https:\/\/istronomyplus.com\/collections\/chesire.oembed","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}