{"product_id":"svbony-f9132a-12-5mm-illuminated-reticle-eyepiece","title":"SVBONY 12.5mm Illuminated Reticle Eyepiece 1.25″ (Double Crosshair)","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378847980661524467861794.jpg?v=1791669969\" alt=\"SVBONY F9132A 12.5mm illuminated reticle eyepiece overview\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe SVBONY F9132A is a 1.25″, 12.5 mm Plössl eyepiece with an illuminated double-crosshair reticle. A red LED lights the reticle, with stepless brightness control powered by three 1.5 V alkaline batteries, so the crosshairs stay visible against a dark sky without overwhelming faint stars. The four-element, fully multi-coated Plössl gives a 40° apparent field with 11 mm of eye relief. The aluminium body has a matte finish, measures 70 x 60 x 60 mm, and weighs 170 g.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378847982730000483374151.jpg?v=1791669969\" alt=\"SVBONY F9132A double crosshair illuminated reticle\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is a good match if you need an accurate centring reference in the eyepiece: aligning a go-to mount on its alignment stars, centring a guide star, or checking polar alignment and tracking for astrophotography.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRed LED double-crosshair reticle:\u003c\/strong\u003e a precise centre reference that stays readable at night.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStepless brightness:\u003c\/strong\u003e set the reticle just bright enough to see against the star.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12.5 mm focal length, 40° field:\u003c\/strong\u003e moderate power for accurate centring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e11 mm eye relief:\u003c\/strong\u003e comfortable for longer alignment sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully multi-coated optics with blackened edges and inner walls:\u003c\/strong\u003e for bright, high-contrast star images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree 1.5 V alkaline batteries:\u003c\/strong\u003e power the illuminator.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378847984697513418194637.jpg?v=1791669969\" alt=\"SVBONY F9132A illuminated eyepiece optics and coatings\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378847986643499648746765.jpg?v=1791669969\" alt=\"SVBONY F9132A illuminated eyepiece brightness control and battery\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eOptical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe F9132A uses a four-element Plössl design with the reticle placed at the eyepiece's focal plane, so the crosshairs and the star come to focus together. The magnification it gives is your telescope's focal length divided by 12.5: 80x on a 1000 mm telescope, 40x on a 500 mm one. That is enough power to centre a star accurately while keeping a 40° field around it.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6387090692454091835650056.jpg?v=1791669969\" alt=\"SVBONY F9132A 12.5mm illuminated eyepiece detail panel\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGo-to alignment:\u003c\/strong\u003e centring alignment stars precisely for better pointing accuracy.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePolar alignment checks and drift alignment.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuide-star centring:\u003c\/strong\u003e for manual guiding or confirming a star is centred.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarrel:\u003c\/strong\u003e 1.25″, for any 1.25″ focuser or diagonal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e three 1.5 V alkaline batteries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e this listing is the eyepiece alone. SVBONY also offers it with a UV\/IR filter; get in touch if you want that combination.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378848046525539683031103.jpg?v=1791669969\" alt=\"SVBONY F9132A illuminated reticle eyepiece specifications and package\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModerate field:\u003c\/strong\u003e at 40° apparent field it is a centring and alignment tool rather than a wide-field viewing eyepiece.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBatteries:\u003c\/strong\u003e three 1.5 V alkaline cells power the illuminator.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIs it difficult to set up?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo. Insert it like any 1.25″ eyepiece, switch on the illuminator and turn the brightness up until the crosshairs are just visible against the star.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat magnification will it give?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYour telescope's focal length divided by 12.5. On a 1000 mm telescope that is 80x.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy a double crosshair?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe two parallel lines frame the star, which makes it easier to judge when it is exactly centred than a single line would.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: a 12.5 mm, 40° 1.25″ Plössl with a stepless red double-crosshair reticle, for accurate star centring during alignment and guiding.\u003c\/p\u003e","brand":"SvBony","offers":[{"title":"Eyepiece","offer_id":67722308911215,"sku":"F9132A","price":41.31,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f9132a-1_20250807113846_5266_20260822140244_2615.webp?v=1791670495","url":"https:\/\/ontariotelescope.com\/products\/svbony-f9132a-12-5mm-illuminated-reticle-eyepiece","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}