{"title":"Nikon Eyepieces","description":"","products":[{"product_id":"nikon-nav-12-5hw-eyepiece","title":"Nikon NAV-12.5HW Eyepiece 12.5mm","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003eThe ultra-wide 102° field of view of the Nikon NAV-12.5HW 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\u003e12.5mm 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 EiC-H10 dedicated converter 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=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/6673\/1845\/files\/NAV-12.5HW_4_480x480.jpg?v=1762745253\"\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\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e16mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMass (Weight)\u003c\/td\u003e\n\u003ctd\u003e670g \/ 690g (with EiC-H10)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e12.5mm \/ 10mm (with EiC-H10)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Components\u003c\/td\u003e\n\u003ctd\u003e7 groups 10 sheets \/ 8 groups 12 sheets (with EiC-H10)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e102° *¹\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField of View Diameter\u003c\/td\u003e\n\u003ctd\u003eΦ22.5mm \/ Φ17.9mm (with EiC-H10)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eΦ64(61*²)mm × 151mm \/ 170mm (with EiC-H10)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Size\u003c\/td\u003e\n\u003ctd\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","brand":"Nikon","offers":[{"title":"Default Title","offer_id":43961700057157,"sku":"BFB20040","price":1749.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/6673\/1845\/files\/NAV-12.5HW.jpg?v=1762742267"},{"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"},{"product_id":"nikon-nav-5sw-5mm-eyepiece","title":"Nikon NAV-5SW 5mm Eyepiece","description":"\u003cp\u003eThis wide-angle \u003cstrong\u003e5mm Niko\u003c\/strong\u003en eyepiece combines a flat, wide field of view with a high eyepoint for easy viewing. The rubber eyecup and light-blocking hood make it easy to look through and block out ambient light, allowing you to enjoy astronomical observation in comfort.\u003c\/p\u003e\n\u003ch3\u003eMain Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWith an apparent field of view of 72°, you can enjoy a wider actual field of view at the same magnification, allowing you to enjoy the impressiveness of outer space.\u003c\/li\u003e\n\u003cli\u003eRather than focusing on numerical values, the eye relief is designed with performance as the priority, and the lens barrel is designed with ease of use in mind, ensuring a nearly constant distance from the end of the eyepiece to the eyepoint. Furthermore , exit pupil aberrations are effectively eliminated, minimizing blackout and coloration when the eye moves away from the eyepoint, improving usability.\u003c\/li\u003e\n\u003cli\u003eThis advanced optical design combines a wide field of view with a flat image. It is compatible with the brightest F-numbers of the astronomical telescope objective optical system it is paired with. The NAV-5SW in particular is compatible with optical systems up to f\/4. It improves the peripheral image without compromising the central image, minimizing field curvature and astigmatism.\u003c\/li\u003e\n\u003cli\u003eTo eliminate stray light that is harmful to observation, light-shielding diaphragms, light-shielding wires, and black paint are used in appropriate locations, and the lens surfaces are multi-coated to reduce harmful reflections and improve transmittance, among other measures.\u003c\/li\u003e\n\u003cli\u003eThe mounting diameter is 31.7mm or 1.25\", the standard \"American size.\" It can be used with various telescopes. It also features a parfocal design, with the flange at the focal point. *Please make sure the eyepiece insertion diameter of your telescope is 31.7mm.\u003c\/li\u003e\n\u003cli\u003eThe eyecup rubber that comes into direct contact with the skin is made of skin-friendly silicone rubber, and features an easy-to-grip knurled design reminiscent of Nikkor lenses.\u003c\/li\u003e\n\u003cli\u003eA silicone rubber light-shielding hood is used to prevent external light disturbances when observing at high magnifications where close contact is not possible, or in places such as parking lots. Unlike the usual \"horn-shaped\" hood, it has a unique shape that can be used by people who wear glasses, and is flexible enough to reduce the transmission of vibrations. It is detachable and can be removed when not needed. \u003c\/li\u003e\n\u003cli\u003eDrip-proof construction with rubber sealing to prevent night dew from seeping in.\u003c\/li\u003e\n\u003cli\u003eThe optional TSA-1 telescope attachment allows for digiscoping. The FSB series compact digital camera bracket allows for collimated photography. It can also be used for lunar and planetary photography, expanding the scope of your photography.\u003c\/li\u003e\n\u003cli\u003eThe innovative eyepiece converter \"EiC-16\" (sold separately) enhances the performance of NAV-SW eyepieces. The \"EiC-16\" converts the magnification to 1.6x. Unlike conventional Barlow lenses, the optical design optimized for the NAV-SW series increases magnification without sacrificing sharpness in the centre, further improving image flatness.\u003c\/li\u003e\n\u003cli\u003eThe mounting system is a 31.7mm\/1.25\" chuck with minimal decentering error.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable border=\"1\"\u003e\n\u003ccolgroup\u003e \u003ccol style=\"width: 50%;\"\u003e \u003ccol style=\"width: 50%;\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e18mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMass (Weight)\u003c\/td\u003e\n\u003ctd\u003e300g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Components\u003c\/td\u003e\n\u003ctd\u003e8 elements in 6 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e72° *¹\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField of View Diameter\u003c\/td\u003e\n\u003ctd\u003eΦ6.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e56.5mm x 91mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Size\u003c\/td\u003e\n\u003ctd\u003eΦ31.7mm  or 1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e*\u003cspan\u003eApparent field of view = Actual field of view x magnification\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/figure\u003e","brand":"Nikon","offers":[{"title":"Default Title","offer_id":43978798104645,"sku":"BFB20030","price":599.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/6673\/1845\/files\/NAV-5SW.jpg?v=1762993589"},{"product_id":"nikon-nav-7sw-7mm-eyepiece","title":"Nikon NAV-7SW 7mm Eyepiece","description":"\u003cp\u003eThis wide-angle \u003cstrong\u003e7mm Nikon\u003c\/strong\u003e eyepiece combines a flat, wide field of view with a high eyepoint for easy viewing. The rubber eyecup and light-blocking hood make it easy to look through and block out ambient light, allowing you to enjoy astronomical observation in comfort.\u003c\/p\u003e\n\u003ch3\u003eMain Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWith an apparent field of view of 72°, you can enjoy a wider actual field of view at the same magnification, allowing you to enjoy the impressiveness of outer space.\u003c\/li\u003e\n\u003cli\u003eRather than focusing on numerical values, the eye relief is designed with performance as the priority, and the lens barrel is designed with ease of use in mind, ensuring a nearly constant distance from the end of the eyepiece to the eyepoint. Furthermore , exit pupil aberrations are effectively eliminated, minimizing blackout and coloration when the eye moves away from the eyepoint, improving usability.\u003c\/li\u003e\n\u003cli\u003eThis advanced optical design combines a wide field of view with a flat image. It is compatible with the brightest F-numbers of the astronomical telescope objective optical system it is paired with. The NAV-7SW especially is compatible with optical systems up to f\/4. It improves the peripheral image without compromising the central image, minimizing field curvature and astigmatism.\u003c\/li\u003e\n\u003cli\u003eTo eliminate stray light that is harmful to observation, light-shielding diaphragms, light-shielding wires, and black paint are used in appropriate locations, and the lens surfaces are multi-coated to reduce harmful reflections and improve transmittance, among other measures.\u003c\/li\u003e\n\u003cli\u003eThe mounting diameter is 31.7mm or 1.25\", the standard \"American size.\" It can be used with various telescopes. It also features a parfocal design, with the flange at the focal point. *Please make sure the eyepiece insertion diameter of your telescope is 31.7mm.\u003c\/li\u003e\n\u003cli\u003eThe eyecup rubber that comes into direct contact with the skin is made of skin-friendly silicone rubber, and features an easy-to-grip knurled design reminiscent of Nikkor lenses.\u003c\/li\u003e\n\u003cli\u003eA silicone rubber light-shielding hood is used to prevent external light disturbances when observing at high magnifications where close contact is not possible, or in places such as parking lots. Unlike the usual \"horn-shaped\" hood, it has a unique shape that can be used by people who wear glasses, and is flexible enough to reduce the transmission of vibrations. It is detachable and can be removed when not needed. \u003c\/li\u003e\n\u003cli\u003eDrip-proof construction with rubber sealing to prevent night dew from seeping in.\u003c\/li\u003e\n\u003cli\u003eThe optional TSA-1 telescope attachment allows for digiscoping. The FSB series compact digital camera bracket allows for collimated photography. It can also be used for lunar and planetary photography, expanding the scope of your photography.\u003c\/li\u003e\n\u003cli\u003eThe innovative eyepiece converter \"EiC-16\" (sold separately) enhances the performance of NAV-SW eyepieces. The \"EiC-16\" converts the magnification to 1.6x. Unlike conventional Barlow lenses, the optical design optimized for the NAV-SW series increases magnification without sacrificing sharpness in the centre, further improving image flatness. The mounting system is a 31.7mm\/1.25\" chuck with minimal decentering error.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable style=\"width: 100%; height: 156.75px;\" border=\"1\"\u003e\n\u003ccolgroup\u003e \u003ccol style=\"width: 50%;\"\u003e \u003ccol style=\"width: 50%;\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eEye Relief\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e17mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eMass (Weight)\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e290g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e7mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eNumber of Components\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: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e72° *¹\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eField of View Diameter\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eΦ8.8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e56.5mm x 71mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eMounting Size\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eΦ31.7mm  or 1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e*\u003cspan\u003eApparent field of view = Actual field of view x magnification\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/figure\u003e","brand":"Nikon","offers":[{"title":"Default Title","offer_id":43978964271173,"sku":"BFB20031","price":599.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/6673\/1845\/files\/NAV-7SW.jpg?v=1762998511"},{"product_id":"nikon-nav-7sw-7mm-eyepiece-copy","title":"Nikon NAV-10SW 10mm Eyepiece","description":"\u003cp\u003eThis wide-angle \u003cstrong\u003e10mm Nikon eyepiece\u003c\/strong\u003e combines a flat, wide field of view with a high eyepoint for easy viewing. The rubber eyecup and light-blocking hood make it easy to look through and block out ambient light, allowing you to enjoy astronomical observation in comfort.\u003c\/p\u003e\n\u003ch3\u003eMain Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWith an apparent field of view of 72°, you can enjoy a wider actual field of view at the same magnification, allowing you to enjoy the impressiveness of outer space.\u003c\/li\u003e\n\u003cli\u003eRather than focusing on numerical values, the eye relief is designed with performance as the priority, and the lens barrel is designed with ease of use in mind, ensuring a nearly constant distance from the end of the eyepiece to the eyepoint. Furthermore , exit pupil aberrations are effectively eliminated, minimizing blackout and coloration when the eye moves away from the eyepoint, improving usability.\u003c\/li\u003e\n\u003cli\u003eThis advanced optical design combines a wide field of view with a flat image. It is compatible with the brightest F-numbers of the astronomical telescope objective optical system it is paired with. The NAV-10SW especially is compatible with optical systems up to f\/4. It improves the peripheral image without compromising the central image, minimizing field curvature and astigmatism.\u003c\/li\u003e\n\u003cli\u003eTo eliminate stray light that is harmful to observation, light-shielding diaphragms, light-shielding wires, and black paint are used in appropriate locations, and the lens surfaces are multi-coated to reduce harmful reflections and improve transmittance, among other measures.\u003c\/li\u003e\n\u003cli\u003eThe mounting diameter is 31.7mm or 1.25\", the standard \"American size.\" It can be used with various telescopes. It also features a parfocal design, with the flange at the focal point. *Please make sure the eyepiece insertion diameter of your telescope is 31.7mm.\u003c\/li\u003e\n\u003cli\u003eThe eyecup rubber that comes into direct contact with the skin is made of skin-friendly silicone rubber, and features an easy-to-grip knurled design reminiscent of Nikkor lenses.\u003c\/li\u003e\n\u003cli\u003eA silicone rubber light-shielding hood is used to prevent external light disturbances when observing at high magnifications where close contact is not possible, or in places such as parking lots. Unlike the usual \"horn-shaped\" hood, it has a unique shape that can be used by people who wear glasses, and is flexible enough to reduce the transmission of vibrations. It is detachable and can be removed when not needed. \u003c\/li\u003e\n\u003cli\u003eDrip-proof construction with rubber sealing to prevent night dew from seeping in.\u003c\/li\u003e\n\u003cli\u003eThe optional TSA-1 telescope attachment allows for digiscoping. The FSB series compact digital camera bracket allows for collimated photography. It can also be used for lunar and planetary photography, expanding the scope of your photography.\u003c\/li\u003e\n\u003cli\u003eThe innovative eyepiece converter \"EiC-16\" (sold separately) enhances the performance of NAV-SW eyepieces. The \"EiC-16\" converts the magnification to 1.6x. Unlike conventional Barlow lenses, the optical design optimized for the NAV-SW series increases magnification without sacrificing sharpness in the centre, further improving image flatness. The mounting system is a 31.7mm\/1.25\" chuck with minimal decentering error.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable border=\"1\" style=\"width: 100%; height: 156.75px;\"\u003e\n\u003ccolgroup\u003e \u003ccol style=\"width: 50%;\"\u003e \u003ccol style=\"width: 50%;\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eEye Relief\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e19mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eMass (Weight)\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e300g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eNumber of Components\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: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e72° *¹\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eField of View Diameter\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eΦ12.6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e56.5mm x 79mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eMounting Size\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eΦ31.7mm  or 1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e*\u003cspan\u003eApparent field of view = Actual field of view x magnification\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/figure\u003e","brand":"Nikon","offers":[{"title":"Default Title","offer_id":43978975674437,"sku":"BFB20032","price":599.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/6673\/1845\/files\/NAV-10SW.jpg?v=1763000959"},{"product_id":"nikon-nav-14sw-14mm-eyepiece","title":"Nikon NAV-14SW 14mm Eyepiece","description":"\u003cp\u003eThis wide-angle \u003cstrong\u003e14mm Nikon eyepiece\u003c\/strong\u003e combines a flat, wide field of view with a high eyepoint for easy viewing. The rubber eyecup and light-blocking hood make it easy to look through and block out ambient light, allowing you to enjoy astronomical observation in comfort.\u003c\/p\u003e\n\u003ch3\u003eMain Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWith an apparent field of view of 72°, you can enjoy a wider actual field of view at the same magnification, allowing you to enjoy the impressiveness of outer space.\u003c\/li\u003e\n\u003cli\u003eRather than focusing on numerical values, the eye relief is designed with performance as the priority, and the lens barrel is designed with ease of use in mind, ensuring a nearly constant distance from the end of the eyepiece to the eyepoint. Furthermore , exit pupil aberrations are effectively eliminated, minimizing blackout and coloration when the eye moves away from the eyepoint, improving usability.\u003c\/li\u003e\n\u003cli\u003eThis advanced optical design combines a wide field of view with a flat image. It is compatible with the brightest F-numbers of the astronomical telescope objective optical system it is paired with. The NAV-14SW especially is compatible with optical systems up to f\/4. It improves the peripheral image without compromising the central image, minimizing field curvature and astigmatism.\u003c\/li\u003e\n\u003cli\u003eTo eliminate stray light that is harmful to observation, light-shielding diaphragms, light-shielding wires, and black paint are used in appropriate locations, and the lens surfaces are multi-coated to reduce harmful reflections and improve transmittance, among other measures.\u003c\/li\u003e\n\u003cli\u003eThe mounting diameter is 31.7mm or 1.25\", the standard \"American size.\" It can be used with various telescopes. It also features a parfocal design, with the flange at the focal point. *Please make sure the eyepiece insertion diameter of your telescope is 31.7mm.\u003c\/li\u003e\n\u003cli\u003eThe eyecup rubber that comes into direct contact with the skin is made of skin-friendly silicone rubber, and features an easy-to-grip knurled design reminiscent of Nikkor lenses.\u003c\/li\u003e\n\u003cli\u003eA silicone rubber light-shielding hood is used to prevent external light disturbances when observing at high magnifications where close contact is not possible, or in places such as parking lots. Unlike the usual \"horn-shaped\" hood, it has a unique shape that can be used by people who wear glasses, and is flexible enough to reduce the transmission of vibrations. It is detachable and can be removed when not needed. \u003c\/li\u003e\n\u003cli\u003eDrip-proof construction with rubber sealing to prevent night dew from seeping in.\u003c\/li\u003e\n\u003cli\u003eThe optional TSA-1 telescope attachment allows for digiscoping. The FSB series compact digital camera bracket allows for collimated photography. It can also be used for lunar and planetary photography, expanding the scope of your photography.\u003c\/li\u003e\n\u003cli\u003eThe innovative eyepiece converter \"EiC-16\" (sold separately) enhances the performance of NAV-SW eyepieces. The \"EiC-16\" converts the magnification to 1.6x. Unlike conventional Barlow lenses, the optical design optimized for the NAV-SW series increases magnification without sacrificing sharpness in the centre, further improving image flatness. The mounting system is a 31.7mm\/1.25\" chuck with minimal decentering error.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable border=\"1\" style=\"width: 100%; height: 156.75px;\"\u003e\n\u003ccolgroup\u003e \u003ccol style=\"width: 50%;\"\u003e \u003ccol style=\"width: 50%;\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eEye Relief\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e18mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eMass (Weight)\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e275g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e14mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eNumber of Components\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: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e72° *¹\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eField of View Diameter\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eΦ17.6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e56.5mm x 77.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eMounting Size\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eΦ31.7mm  or 1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e*\u003cspan\u003eApparent field of view = Actual field of view x magnification\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/figure\u003e","brand":"Nikon","offers":[{"title":"Default Title","offer_id":43979032232005,"sku":"BFB20033","price":599.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/6673\/1845\/files\/NAV-14SW.jpg?v=1763001359"}],"url":"https:\/\/bintel.com.au\/zh\/collections\/nikon-eyepieces.oembed","provider":"The Binocular and Telescope Shop","version":"1.0","type":"link"}