{"product_id":"4-7-ethos-sx","title":"4.7 Ethos-SX","description":"\u003cp\u003eAl Nagler eagerly pushed Ethos designer Paul Dellechiaie to extend the new 3.7mm focal length to reach 110°, the same field size as the LEM Simulator optics Al designed 45-years ago to train NASA astronauts for lunar landings.\u003c\/p\u003e\n\u003cp\u003eThe new 4.7mm Ethos-SX, like its 3.7mm progenitor, is designed and crafted to combine its exceedingly wide field of view with all the contrast, color-rendition, distortion correction and center-to-edge sharpness needed to achieve that natural view.\u003c\/p\u003e\n\u003cp\u003eCompared to a lower power eyepiece with the equivalent TFOV (similar field stop) such as an 11mm Plössl (9.1mm field stop), the greater power - for higher resolution, and smaller exit pupil (for a darker background to enhance contrast) reveals a deep sky experience \"even better than you imagined\".\u003c\/p\u003e\n\u003cp\u003eThe 4.7mm is a 1¼\" format and is parfocal with the wide range of 1¼\" Tele Vue eyepieces. 2\" adapter included.\u003c\/p\u003e\n\u003ctable class=\"prodSpecTblEP\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel #\u003c\/td\u003e\n\u003ctd\u003eETH-04.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length (mm)\u003c\/td\u003e\n\u003ctd\u003e4.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size (in.)\u003c\/td\u003e\n\u003ctd\u003e2\" \u0026amp; 1¼\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View (deg.)\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief (mm)\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (lb \/ oz)\u003c\/td\u003e\n\u003ctd\u003e1.30 \/ 20.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diam. (mm)\u003c\/td\u003e\n\u003ctd\u003e8.94\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51374569062688,"sku":"ETH-04.7","price":745.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/2135\/2480\/files\/image_6f87f088-12b1-4c9b-940e-74809bfc3a4f.jpg?v=1774415800","url":"https:\/\/firstlightastro.com\/products\/4-7-ethos-sx","provider":"First Light Astro","version":"1.0","type":"link"}