{"product_id":"svbony-sv136-34mm-72-degree-eyepiece","title":"SVBONY SV136 2″ 34mm 72° Wide-Field Eyepiece","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6386060635245778857423486.webp\" alt=\"SVBONY SV136 34mm 72 degree 2 inch eyepiece key visual\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe SVBONY SV136 34 mm is a 2″ wide-field eyepiece with a 72° apparent field of view and a 40 mm field stop. Its fully multi-coated 5-element, 4-group design gives 24 mm of eye relief, and the barrel carries a standard 2″ (M48 × 0.75) filter thread. At 34 mm it is a low-power, maximum-field eyepiece — the one that frames large nebulae, open clusters and star fields, and the easiest to find targets with.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6386060759794373434212270.webp\" alt=\"SVBONY SV136 34mm eyepiece 72 degree wide field\" 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 your telescope has a 2″ focuser or diagonal and you want the widest true field it can deliver — for sweeping the Milky Way, framing the Double Cluster or the Veil, or as a finding eyepiece before switching to higher power. The 24 mm eye relief and folding eyecup work for observers with or without glasses.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e72° apparent field:\u003c\/strong\u003e a wide, immersive view at low power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40 mm field stop:\u003c\/strong\u003e close to the practical maximum for a 2″ barrel, so the true field is about as wide as your telescope allows.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24 mm eye relief:\u003c\/strong\u003e with a fixed folding rubber eyecup, usable with or without glasses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully multi-coated, blackened edges:\u003c\/strong\u003e for contrast and to cut internal reflections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo-step anodized aluminium body:\u003c\/strong\u003e matte finish that resists reflections and glare.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2″ filter thread (M48 × 0.75):\u003c\/strong\u003e takes SVBONY 2″ filters.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6386060762352539691247455.webp\" alt=\"SVBONY SV136 34mm eyepiece deep-sky observing\" 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\/6386060765270886588291832.webp\" alt=\"SVBONY SV136 34mm eyepiece multi-coated optics\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eOptical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe SV136 uses five elements in four groups, fully multi-coated, to spread a 72° field across a 40 mm field stop. Because true field is set by the field stop divided by the telescope's focal length, a 40 mm stop gives roughly 2.3° of sky on a 1000 mm telescope at about 29×, and close to 4° on a 600 mm refractor. The exit pupil grows with focal ratio — about 6.8 mm at f\/5 — which is worth matching to your telescope and sky conditions.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge nebulae:\u003c\/strong\u003e the Veil, North America and Orion nebulae, especially with a 2″ nebula filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen clusters and star fields:\u003c\/strong\u003e the Double Cluster, the Pleiades and Milky Way sweeping.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinding and framing:\u003c\/strong\u003e locate targets at low power before moving to a shorter eyepiece.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoon and bright planets at low power:\u003c\/strong\u003e whole-disc lunar views.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6386060766812652829924893.webp\" alt=\"SVBONY SV136 34mm eyepiece folding eyecup\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\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 2″ only — needs a 2″ focuser or diagonal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilters:\u003c\/strong\u003e M48 × 0.75 thread for SVBONY 2″ filters.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6386060768741290921188720.webp\" alt=\"SVBONY SV136 34mm eyepiece 2 inch barrel and filter thread\" 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\u003e2″ focuser required:\u003c\/strong\u003e it does not fit 1.25″-only focusers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExit pupil:\u003c\/strong\u003e on fast telescopes (f\/4–f\/5) the exit pupil is large; on Newtonians the secondary shadow can become visible in daylight or bright skies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e SVBONY does not publish this eyepiece's weight.\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. It slides into a 2″ focuser or diagonal and is held by the clamp screw or compression ring like any 2″ eyepiece.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I wear glasses with it?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes. The 24 mm eye relief and folding eyecup are designed to work with or without glasses.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eLow-power, wide-field observing of large nebulae, open clusters and star fields, and as a finding eyepiece.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill it work in my 1.25″ focuser?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo; it has a 2″ barrel only.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: a 2″, 34 mm eyepiece with a 72° field, a 40 mm field stop and 24 mm eye relief — a low-power, wide-field eyepiece for telescopes with a 2″ focuser.\u003c\/p\u003e","brand":"SvBony","offers":[{"title":"Default Title","offer_id":67722227581039,"sku":"F9172D","price":99.75,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f9172d-1_20250807165016_1722.jpg?v=1791670116","url":"https:\/\/ontariotelescope.com\/products\/svbony-sv136-34mm-72-degree-eyepiece","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}