{"product_id":"svbony-f9164a-m42-to-1-25-eyepiece-adapter","title":"SVBONY F9164A M42 to 1.25″ Eyepiece Adapter with Coaxial Lock","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/w9101_20250807091556_89161_20260822140201_5376.webp?v=1791670082\" alt=\"SVBONY F9164A M42 to 1.25″ eyepiece adapter with coaxial lock\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe SVBONY F9164A is an M42 to 1.25″ adapter: an M42 thread on one end and a 1.25″ holder on the other. It lets you hold 1.25″ eyepieces, or a camera with a 1.25″ nosepiece, on optics with an M42 connection, and lets M42-format eyepieces work with modern 1.25″ equipment. The holder uses a coaxial lock with a PETF inner ring that grips the barrel evenly. Net weight is 71.8 g (2.53 oz), finished in black and blue.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is a good match if you want to use 1.25″ eyepieces or a 1.25″ planetary camera on an M42-threaded optic such as an SVBONY spotting scope, or if you have older M42-format eyepieces you want to keep using.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eM42 to 1.25″ conversion:\u003c\/strong\u003e bridges M42-threaded optics and 1.25″ eyepieces or cameras.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoaxial lock:\u003c\/strong\u003e clamps the barrel concentrically so the eyepiece or camera stays centred and does not slip.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePETF inner ring:\u003c\/strong\u003e a durable, resilient ring that grips without marking the barrel.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eLight at 71.8 g.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f9164a-2_20250807093709_6230.jpg?v=1791670082\" alt=\"SVBONY F9164A eyepiece adapter PETF inner ring\" 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\u003eDigiscoping and planetary video:\u003c\/strong\u003e mounting a 1.25″ CMOS camera on an SVBONY spotting scope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLegacy eyepieces:\u003c\/strong\u003e using M42-format eyepieces with current 1.25″ equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwapping eyepieces:\u003c\/strong\u003e a quick, secure 1.25″ holder on M42-threaded optics.\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\u003eSVBONY SV28 and SV14 spotting scopes:\u003c\/strong\u003e SVBONY pairs this adapter (F9164A) with the F9110A extension tube to connect a 1.25″ CMOS camera such as the SC001, SV105 or SV205.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSVBONY SV13 spotting scope:\u003c\/strong\u003e SVBONY pairs it with the F9162A extension tube for the same purpose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHolder:\u003c\/strong\u003e standard 1.25″ eyepiece and camera barrels.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6387193386213265025742136.jpg?v=1791669945\" alt=\"SVBONY F9164A M42 to 1.25″ eyepiece adapter connection example\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003cp\u003eIf you are connecting a different scope or camera, send us the models and we will work out the adapter chain with you.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWhat's in the Box\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e1 x SVBONY 1.25″ focuser adapter\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f9164a-3_20250807093709_9198.jpg?v=1791670082\" alt=\"SVBONY F9164A adapter thread side\" 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\u003eExtension tubes sold separately:\u003c\/strong\u003e the camera setups above use the F9110A or F9162A tube in addition to this adapter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical adapter:\u003c\/strong\u003e it contains no optics.\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. Thread the M42 end onto your optic, slide the 1.25″ eyepiece or camera into the holder and tighten the coaxial lock.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I mount a planetary camera with it?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes. SVBONY uses it with an extension tube to connect 1.25″ CMOS cameras such as the SC001, SV105 and SV205 to its SV28, SV14 and SV13 spotting scopes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does the coaxial lock do?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eIt closes evenly around the barrel, keeping the eyepiece or camera centred and preventing it from slipping.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: a 71.8 g M42 to 1.25″ adapter with a coaxial lock and PETF ring, holding 1.25″ eyepieces and cameras securely on M42-threaded optics.\u003c\/p\u003e","brand":"SvBony","offers":[{"title":"Default Title","offer_id":67722221060207,"sku":"F9164A","price":22.79,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/w9101_20250807091556_89161_20260822140201_5376.webp?v=1791670082","url":"https:\/\/ontariotelescope.com\/products\/svbony-f9164a-m42-to-1-25-eyepiece-adapter","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}