{"product_id":"sky-watcher-emerald-9mm-82-1-25-eyepiece","title":"Sky-Watcher Emerald 9mm 82° 1.25\" Eyepiece","description":"\u003ch2\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h2\u003e\u003cp\u003eThe Sky-Watcher Emerald 9mm 82° 1.25-inch Eyepiece is an ultra-wide visual astronomy eyepiece designed for immersive, high-magnification observing. With an 82° apparent field of view, 7-element optical design, 8mm eye relief, filter threading, and an included carry case, it gives observers a wide, engaging view while keeping the eyepiece compact and easy to use.\u003c\/p\u003e\u003ch2\u003e\u003cstrong\u003eWho Is This Product Best For?\u003c\/strong\u003e\u003c\/h2\u003e\u003cp\u003eThis eyepiece is best for visual observers who want a wider apparent field than standard Plössl-style eyepieces, especially for lunar observing, planetary viewing, double stars, globular clusters, and smaller deep-sky targets. It is suitable for beginner-to-intermediate observers upgrading their eyepiece kit, as well as experienced observers who want a compact ultra-wide 1.25-inch eyepiece.\u003c\/p\u003e\u003ch2\u003e\u003cstrong\u003eWhy Choose This Product?\u003c\/strong\u003e\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-wide 82° view:\u003c\/strong\u003e Gives a more immersive observing experience and keeps objects in view longer on manual mounts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9mm focal length:\u003c\/strong\u003e Useful for higher magnification on the Moon, planets, double stars, and compact deep-sky objects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25-inch compatibility:\u003c\/strong\u003e Works with common 1.25-inch focusers, diagonals, and filter systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7-element optical design:\u003c\/strong\u003e Built for wide-field performance in a compact visual eyepiece.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded carry case:\u003c\/strong\u003e Helps protect the eyepiece during storage and transport.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLunar and planetary observing.\u003c\/li\u003e\n\u003cli\u003eDouble stars and compact star clusters.\u003c\/li\u003e\n\u003cli\u003eHigher-power views in refractors, Maksutovs, Schmidt-Cassegrains, Newtonians, and Dobsonians.\u003c\/li\u003e\n\u003cli\u003eManual telescope users who benefit from a wider field of view.\u003c\/li\u003e\n\u003cli\u003eVisual observing with compatible 1.25-inch filters.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h2\u003e\u003cp\u003eThe 9mm Emerald uses a 1.25-inch barrel and is threaded for compatible 1.25-inch filters. It can be used with telescopes that accept 1.25-inch eyepieces through the focuser or diagonal. As with any high-power eyepiece, final magnification depends on the telescope focal length.\u003c\/p\u003e\u003ch2\u003e\u003cstrong\u003eImportant Limitations\u003c\/strong\u003e\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eShorter eye relief:\u003c\/strong\u003e The 9mm version has 8mm eye relief, which may be tight for observers who wear glasses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher magnification:\u003c\/strong\u003e Performance depends on seeing conditions and telescope optics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisual use:\u003c\/strong\u003e This is an eyepiece for visual observing, not a camera adapter or imaging accessory.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h2\u003e\u003ch3\u003e\u003cstrong\u003eIs this eyepiece good for beginners?\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eYes. It is a strong upgrade for beginners who want a wider, more immersive view than typical kit eyepieces, though the 9mm focal length is best used when seeing conditions support higher magnification.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIt is best used for the Moon, planets, double stars, globular clusters, and compact deep-sky targets.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWill it fit my telescope?\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIt will fit telescopes that accept standard 1.25-inch eyepieces.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCan I use filters with it?\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eYes. The eyepiece is threaded for compatible 1.25-inch filters.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWhen should I choose a different focal length?\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eChoose the 16mm or 22mm Emerald if you want lower magnification, a brighter view, or a wider true field for larger objects.\u003c\/p\u003e\u003ch2\u003e\u003cstrong\u003eOur Recommendation\u003c\/strong\u003e\u003c\/h2\u003e\u003cp\u003eOntario Telescope recommends the Sky-Watcher Emerald 9mm 82° eyepiece for observers who want a compact ultra-wide eyepiece for higher-power visual observing. It is especially useful when you want more field of view than a standard short focal length eyepiece while still using a 1.25-inch format.\u003c\/p\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":53206308913263,"sku":"S51002","price":300.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/skywatcher-emerald-9mm-82-eyepiece-main.jpg?v=1781023373","url":"https:\/\/ontariotelescope.com\/products\/sky-watcher-emerald-9mm-82-1-25-eyepiece","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}