{"product_id":"tele-vue-np101is-npi-4057","title":"Tele Vue NP101is (NPI-4057)","description":"\u003ch2\u003eTele Vue NP101is\u003c\/h2\u003e\n\u003cdiv class=\"woocommerce-tabs wc-tabs-wrapper container tabbed-content\"\u003e\n\u003cdiv class=\"tab-panels\"\u003e\n\u003cdiv aria-labelledby=\"tab-title-description\" role=\"tabpanel\" id=\"tab-description\" class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--description panel entry-content active\"\u003e\n\u003cp\u003eTele Vue’s “is” designation denotes instruments capable of accepting Imaging System photographic accessories. Tele Vue has designed this series of accessories in conjunction with each optical system so you are ensured of compatibility and maximum performance. While the Tele Vue NP101is maintains all the visual prowess of the standard NP101, the larger rear elements and larger focuser along with a host of proprietary Imaging System accessories, make it ideally suited for the CCD imager.\u003c\/p\u003e\n\u003ch4\u003eConcept\u003c\/h4\u003e\n\u003cp\u003eCCD cameras have challenged telescope optics beyond anything ever placed at the focal plane. I knew our APO objectives were up to the challenge, and with the proper tweaks would be extraordinary tools for the imager. With Tele Vue Imaging System (“is”) telescopes, we have refined our instruments and optional equipment beyond anything a CCD chip has seen.\u003c\/p\u003e\n\u003ch4\u003eDevelopment\u003c\/h4\u003e\n\u003cp\u003eFor 30 years, Tele Vue has pushed the boundaries of APO refractors, as well as eyepieces, to the recognized pinnacle of performance. We were gratified but not surprised that Backyard Astronomer’s Guide said of the NP101: “optics don’t get any better than this.” No wonder Sky and Telescope rated the NP101 tops and selected it as the test instrument for its landmark review of the SBIG STL11000 CCD camera . The “is” versions of the Tele Vue-60, NP101, and NP127 retain the exemplary wide field and planetary visual capability while adding new features to make imaging easier and more flexible.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTele Vue-NP101is\u003c\/li\u003e\n\u003cli\u003eTele Vue-NP127is\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWe were determined to make the NP series optically, mechanically, and functionally as perfect as possible for imaging up to 50mm diagonal chips without penalty to its near ideal visual operation. How? By applying the developments created for the Tele Vue-60is to the new NP101is and NP127is and then going beyond.\u003c\/p\u003e\n\u003cp\u003eThe NP101 (540mm, f\/5.4, 4″) and NP127 (660mm, f\/5.2, 5″) maintain their optical specifications yet with redesigned 4-element optical systems. Larger rear lens groups absolutely minimize vignetting in formats up to 50mm diagonal. For these large chips an optional field corrector was developed so the corners of the newly brightened edges would virtually be as perfect as the center of the field.\u003c\/p\u003e\n\u003cp\u003eNext, to take full advantage of the larger lenses, we developed a larger focuser and draw tube having a 3″ front aperture and 2.4″ rear aperture. This eliminates any restriction of the larger diameter converging light cone. We build and test the rack and pinion focuser to hold 12 lbs. of weight, yet still permit extremely fine focusing control via a 10:1 dual speed pinion assembly. This new draw tube also permits quick change from visual to imaging operation and allows full camera rotation without focus change. In addition, it has the capability to correct for any residual focal plane tilt and accepts a “position stop” for our digital micrometer to allow repeatable focus measurement to 0.0001″.\u003c\/p\u003e\n\u003cp\u003eTo maintain squareness to the optical axis while changing camera orientation, the draw tube has three lock screws that tighten against a taper on the “imaging insert” ring. This insert is threaded to accept Tele Vue’s new Imaging System accessories including large diameter extension tubes, optical accessories, and camera and CCD attachments, all with mating threads.\u003c\/p\u003e\n\u003cp\u003eThe Focusmate 10:1 planetary ball type reduction focuser provides extremely sensitive focus adjustment, measurable with the optional Digital Micrometer Kit to better than 1\/10,000″. Also, the optional Focusmate Driver permits electronic motor control of the focusing process. The Focusmate Driver has direction push-buttons and adjustable speed. A tap on the button permits vibration-free focusing in steps as small as approximately 0.0005″.\u003c\/p\u003e\n\u003cp\u003eTele Vue has been known for producing visual instruments “even better than you imagined.” We aim to achieve the same with our imaging equipment. Our dedicated local machinists and in-house staff are as committed as ever to deliver on these quality and performance goals.\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\" data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch4\u003eNP101is Specifications\u003c\/h4\u003e\n\u003cp\u003eType: APO (Nagler-Petzval) Refractor\u003cbr\u003e(Elements\/Groups: 4\/2)\u003cbr\u003eObjective (mm): 101\u003cbr\u003eFocal Length (mm): 540\u003cbr\u003eFocal Ratio (f\/#): 5.4\u003cbr\u003eLength OTA (inch): 25.5\u003cbr\u003eLength with diagonal (inch): 28.5\u003cbr\u003eWeight OTA\/Std. Config (lbs): 10.7 \/ 10.7\u003cbr\u003eDrawtube\/Focuser: 2.4-inch, Focusmate dual-speed rack\/pinion\u003cbr\u003eMaximum Visual Field (deg.): 4.9 (with 2-inch 55mm Plössl)\u003cbr\u003eMaximum Recommended Power (x): 250\u003cbr\u003eTele Vue Eyepiece Performance: View\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/televue.com\/engine\/TV3b_page.asp?plain=TRUE\u0026amp;id=212\u0026amp;NoBack=True\u0026amp;focal_length=660\u0026amp;fl_unit=mm\u0026amp;aperture=127\u0026amp;a_unit=mm\u0026amp;sortby=SortTrueField\u0026amp;_2in=yes\u0026amp;title=NP%2D127is\u0026amp;SUBMIT1=CALCULATE#results\" target=\"_blank\"\u003eEyepiece Chart\u003c\/a\u003e\u003c\/p\u003e\n\u003ch4\u003eNP101is Hard Case Specifications\u003c\/h4\u003e\n\u003cp\u003eFits TV-NP101, TV-NP101is, and Genesis (f\/5) only.\u003cbr\u003eSignificantly shorter (7.5″) than NP101\/NP101is hard case it replaces.\u003cbr\u003eSupports telescope by the tube, taking pressure off the front cell and focuser pinion.\u003cbr\u003eTwo removable soft carry bags in the case lid hold a variety of accessories including the diagonal, and 9 eyepiece cutouts. There are three more cutouts in the hardcase itself.\u003cbr\u003eDual handles designed to fit together comfortably in hand.\u003cbr\u003ePositive lock latches with locks.\u003cbr\u003eDigital Indicator and Starbeam friendly.\u003cbr\u003eOpens flat.\u003cbr\u003eApproximate maximum exterior dimensions (handles flat): 30½x11x9¾inches (75x30x25cm)\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 class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_2 panel entry-content\" id=\"tab-local_2\" role=\"tabpanel\" aria-labelledby=\"tab-title-local_2\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eNP101is\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eEnlarged focuser with 3″ entrance aperture and 2.4″ exit aperture\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFocuser body has brass clamp ring with 2-lock knobs\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eAccessory end-ring with tilt capability and 3-lock knobs\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eImaging insert threaded for Imaging System components.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e2″ accessory insert for visual or other 2″ accessories\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFocusmate dual-speed focuser 10:1\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSliding metal dew shield\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eScrew-on metal lens cover\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHard-shell carry case\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eManual \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.televue.com\/Pdf\/Literature\/Limited%20Warranty%20for%20Telescopes%20Accessories%20and%20Electronics.pdf?utm_source=print\u0026amp;utm_medium=paper\u0026amp;utm_campaign=printTVOTelAccWarranty\u0026amp;utm_content=TVTelAccWarranty\"\u003eTele Vue 5-Years Warranty\u003c\/a\u003e\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-NP101is-Operating-Guide.pdf?v=1670002984\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eTele Vue NP101is Operating Guide\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cfigure class=\"wp-caption alignleft\" aria-describedby=\"caption-attachment-5451\" id=\"attachment_5451\"\u003e\u003c\/figure\u003e\n\u003c\/div\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\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"related related-products-wrapper product-section\"\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"Tele Vue","offers":[{"title":"Default Title","offer_id":43133219635429,"sku":"TV-NPI-4057","price":5974.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/tele-vue-np101is-npi-4057-astronomy-plus-1_11230a92-d513-4ea0-9ac6-c7b197d57844.png?v=1690484170","url":"https:\/\/istronomyplus.com\/products\/tele-vue-np101is-npi-4057","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}