{"product_id":"nikon-nav-17-5hw-eyepiece","title":"Nikon NAV-17HW Eyepiece 17mm","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003eThe ultra-wide 102° field of view of the Nikon NAV-17HW makes you feel like you've jumped into outer space. It also comes with a converter that provides the performance of two eyepieces.\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan dir=\"auto\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eThis \u003cstrong\u003e17mm focal length\u003c\/strong\u003e, \u003cstrong\u003e2\" diamete\u003c\/strong\u003er Nikon eyepiece is a stepping stone to an unparalleled dimension, perfect for astronomy enthusiasts who demand optical performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eUltra-wide 102° field of view\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eThe 102° apparent field of view is so overwhelmingly wide that you can't see the entire expanse of space in front of you at a glance. Experience the dramatic impact of this 102° apparent field of view, which will make you forget you're even looking through an eyepiece. Experience the ultra-wide field of view, which even at 100x magnification, can fit the Moon's disk in its entirety.\u003c\/p\u003e\n\u003ch3\u003eAdvanced aberration correction\u003c\/h3\u003e\n\u003cp\u003eThis advanced optical design combines a wide field of view with flatness of the image. It is fully compatible with the bright F-number (f\/4) of the objective optical system it is paired with. Furthermore, the central image remains sharp while field curvature and astigmatism are minimized to the utmost, allowing you to fully experience the benefits of a wide field of view with sharp star images all the way to the corners of the field.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"margin-right: 80px; margin-left: 80px; float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/6673\/1845\/files\/NAV-12.5HW_3_480x480.jpg?v=1762744998\"\u003e\u003c\/div\u003e\n\u003ch3\u003eIncludes the Eyepiece Innovative Converter \"EiC\" as standard, giving you the value of two for the price of one\u003c\/h3\u003e\n\u003cp\u003eThe dedicated converter \"EiC-H14 (for NAV-17HW)\" is included as standard. Simply screw it onto the end of the barrel to increase the focal length to 10mm, improving magnification and effectively correcting aberrations (field curvature and astigmatism). It truly has the performance of two high-performance eyepieces.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/6673\/1845\/files\/NAV-17HW_2_480x480.jpg?v=1762992002\"\u003e\u003c\/div\u003e\n\u003ch3\u003eKeep stray light away\u003c\/h3\u003e\n\u003cp\u003eTo minimize stray light that is harmful to observation, optical simulations were conducted, taking into account even large angles of incidence. Light-blocking apertures, light-blocking lines, black paint, etc. were used appropriately. Multi-coating was applied to the lens surfaces, suppressing harmful reflections and improving contrast.\u003c\/p\u003e\n\u003ch3\u003eDetachable light-shielding hood\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eA light-shielding hood is used to prevent external light disturbances when observing at high magnifications where it is not possible to keep the eye close to the object, or in places such as parking lots. It is detachable and can be removed when not needed. Unlike regular \"horn-shaped eyecups,\" it has a unique shape that allows observation while wearing glasses, and is flexible enough to reduce the transmission of vibrations.\u003c\/p\u003e\n\u003cdiv class=\"mod-mainFeatureBlock-heading\"\u003e\n\u003cdiv class=\"mod-headingV3 mod-headingV3--type-noborder\"\u003e\n\u003ch3 class=\"mod-headingV3-title\"\u003e\u003cspan dir=\"auto\"\u003e2-inch size 50.8mm mounting diameter\u003c\/span\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mod-mainFeatureBlock-detail\"\u003e\n\u003cdiv class=\"mod-mainFeatureBlock-text\"\u003e\u003cspan dir=\"auto\"\u003eThe mounting diameter is 50.8mm, which is the international standard, so it can be used with many astronomical telescopes from various manufacturers.\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; height: 156.75px;\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 29.8939%; height: 19.5938px;\"\u003eEye Relief\u003c\/td\u003e\n\u003ctd style=\"width: 67.2489%; height: 19.5938px;\"\u003e16mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 29.8939%; height: 19.5938px;\"\u003eMass (Weight)\u003c\/td\u003e\n\u003ctd style=\"width: 67.2489%; height: 19.5938px;\"\u003e950g \/ 990g (with EiC-H10)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 29.8939%; height: 19.5938px;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"width: 67.2489%; height: 19.5938px;\"\u003e17mm \/14mm (with EiC-H10)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 29.8939%; height: 19.5938px;\"\u003eNumber of Components\u003c\/td\u003e\n\u003ctd style=\"width: 67.2489%; height: 19.5938px;\"\u003e7 groups 10 sheets \/ 8 groups 12 sheets (with EiC-H40)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 29.8939%; height: 19.5938px;\"\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd style=\"width: 67.2489%; height: 19.5938px;\"\u003e102° *¹\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 29.8939%; height: 19.5938px;\"\u003eField of View Diameter\u003c\/td\u003e\n\u003ctd style=\"width: 67.2489%; height: 19.5938px;\"\u003eΦ30.mm \/ Φ24.6mm (with EiC-H14)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 29.8939%; height: 19.5938px;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"width: 67.2489%; height: 19.5938px;\"\u003eΦ64(61*²)mm × 157mm \/ 167mm (with EiC-H14)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 29.8939%; height: 19.5938px;\"\u003eMounting Size\u003c\/td\u003e\n\u003ctd style=\"width: 67.2489%; height: 19.5938px;\"\u003eΦ31.7mm \/ Φ50.8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e*¹ Apparent field of view = Actual field of view × magnification\u003c\/li\u003e\n\u003cli\u003e*² The outer diameter of the metal lens barrel with the rubber knurling removed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"mod-headingV4\"\u003e\n\u003ch4 class=\"mod-headingV4-title\"\u003e\u003cspan dir=\"auto\"\u003eSleeve dimensions\u003c\/span\u003e\u003c\/h4\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mod-specialtyText\"\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eWhen using this product, please make sure that there are no interfering parts inside the telescope sleeve. The spacer H17 included with the NAV-17HW can be attached or removed as needed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/6673\/1845\/files\/NAV-17HW_3.jpg?v=1762992413\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Nikon","offers":[{"title":"Default Title","offer_id":43962189217861,"sku":"BFB20041","price":1749.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/6673\/1845\/files\/NAV-17HW_1.jpg?v=1762993125","url":"https:\/\/bintel.com.au\/zh\/products\/nikon-nav-17-5hw-eyepiece","provider":"The Binocular and Telescope Shop","version":"1.0","type":"link"}