{"product_id":"qhy-cfw3-motor-driven-electronic-filter-wheel","title":"QHY CFW3 Motor Driven Electronic Filter Wheel","description":"\u003ch2\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h2\u003e\u003cp\u003eThe QHY CFW3 Motor Driven Electronic Filter Wheel is a family of automated filter wheels designed for monochrome astrophotography camera systems. It allows imagers to automate LRGB, narrowband, photometric, and specialty filter changes during an imaging session, reducing manual handling and helping keep the imaging train consistent from frame to frame.\u003c\/p\u003e\u003cp\u003eThe QHY CFW3 series is available in four Shopify variants: QHYCFW3S-SR\/US, QHYCFW3M-SR\/US, QHYCFW3L, and QHYCFW3XL. Each model supports different filter sizes and camera formats, so the correct choice depends on your camera sensor size, filter format, available back focus, and the adapters required for your imaging train.\u003c\/p\u003e\u003ch2\u003e\u003cstrong\u003eWho Is This Product Best For?\u003c\/strong\u003e\u003c\/h2\u003e\u003cp\u003eThis product is best for deep-sky astrophotographers using monochrome astronomy cameras who want reliable, repeatable, automated filter changes. It is especially useful for imagers building LRGB, SHO, HOO, narrowband, or multi-filter imaging workflows with QHY cameras, cooled mono cameras, refractors, astrographs, RC telescopes, SCTs, and other imaging telescopes.\u003c\/p\u003e\u003cp\u003eThe QHY CFW3 is most appropriate for intermediate and advanced astrophotographers, or for beginners who are already moving into monochrome camera imaging and understand filter size, back focus, and adapter requirements.\u003c\/p\u003e\u003ch2\u003e\u003cstrong\u003eWhy Choose This Product?\u003c\/strong\u003e\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour model options:\u003c\/strong\u003e Choose from S, M, L, and XL configurations to match 1.25-inch, 31mm, 36mm, 2-inch, 50mm round, or 50mm square filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomated filter changes:\u003c\/strong\u003e Ideal for unattended LRGB and narrowband imaging sequences.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQHY camera integration:\u003c\/strong\u003e Compatible QHY cameras can control the filter wheel through the QHY 4-pin filter wheel port.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB control option:\u003c\/strong\u003e The filter wheel can also be controlled independently through USB when used with compatible software.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficient rotation:\u003c\/strong\u003e The CFW3 can reverse rotation direction to reach the next filter position efficiently.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact imaging train design:\u003c\/strong\u003e The thin body helps manage back focus in demanding astrophotography setups.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLRGB imaging:\u003c\/strong\u003e Automate luminance, red, green, and blue filter changes with monochrome cameras.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNarrowband imaging:\u003c\/strong\u003e Use SHO, HOO, or other narrowband filter sets for emission nebulae and deep-sky work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote or unattended imaging:\u003c\/strong\u003e Reduce manual interaction during automated capture sequences.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQHY mono camera systems:\u003c\/strong\u003e Build a cleaner QHY imaging train with compatible camera-side control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge-format imaging:\u003c\/strong\u003e Use the L or XL versions for larger filters and larger camera sensors.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h2\u003e\u003cp\u003eSelect the QHY CFW3 model by matching the filter size and wheel capacity to your camera sensor. Smaller sensors may work well with 1.25-inch, 31mm, or 36mm filters, while larger sensors usually require 2-inch, 50mm round, or 50mm square filters to reduce vignetting.\u003c\/p\u003e\u003cp\u003eThe CFW3 can be controlled through USB or through the QHY 4-pin filter wheel port on compatible QHY cameras. When using the QHY camera control port, power and control may be handled through the camera-side connection. When using USB control, follow QHY’s recommended power and cable configuration for reliable operation.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eQHY CFW3 Model Compatibility Table\u003c\/strong\u003e\u003c\/h3\u003e\u003ctable class=\"product-specifications\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eFilter Wheel\u003c\/th\u003e\n\u003cth\u003eFilter Supported\u003c\/th\u003e\n\u003cth\u003eRecommended Cameras\u003c\/th\u003e\n\u003cth\u003eBack Focus Consumed\u003c\/th\u003e\n\u003cth\u003eUsable Height Limit\u003c\/th\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCFW3S-SR \/ CFW3S-US\u003c\/td\u003e\n\u003ctd\u003e7 × 1.25-inch mounted or 31mm unmounted\u003c\/td\u003e\n\u003ctd\u003eQHY533M, QHY183M, QHY5III mono planetary cameras with adapter\u003c\/td\u003e\n\u003ctd\u003e20mm (SR) + 4mm adapter \/ 15.5mm (US) + 4mm adapter\u003c\/td\u003e\n\u003ctd\u003e5.5mm (US) \/ 10mm (SR)\u003c\/td\u003e\n\u003ctd\u003eAbout 430g\u003c\/td\u003e\n\u003ctd\u003eS-SR is compatible with thicker 1.25-inch mounted filters.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCFW3M-SR \/ CFW3M-US\u003c\/td\u003e\n\u003ctd\u003e5 × 2-inch mounted or 50mm unmounted; 7 × 36mm unmounted for M-US\u003c\/td\u003e\n\u003ctd\u003eQHY163M, QHY294M, QHY268M, QHY600M\u003c\/td\u003e\n\u003ctd\u003e20.5mm + 2mm adapter (M-SR) \/ 17mm + 2mm adapter (M-US)\u003c\/td\u003e\n\u003ctd\u003e10mm (M-SR) \/ 5.5mm (M-US)\u003c\/td\u003e\n\u003ctd\u003eAbout 720g (M-SR) \/ 700g (M-US)\u003c\/td\u003e\n\u003ctd\u003eChoose SR or US configuration based on filter type and required spacing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCFW3L\u003c\/td\u003e\n\u003ctd\u003e7 × 2-inch mounted or 50mm unmounted\u003c\/td\u003e\n\u003ctd\u003eQHY600M PH\/Pro\u003c\/td\u003e\n\u003ctd\u003e21.5mm\u003c\/td\u003e\n\u003ctd\u003e10mm\u003c\/td\u003e\n\u003ctd\u003eAbout 900g\u003c\/td\u003e\n\u003ctd\u003eLarge-format filter wheel for 2-inch or 50mm round filter imaging trains.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCFW3XL\u003c\/td\u003e\n\u003ctd\u003e9 × 2-inch mounted \/ 50mm unmounted or 7 × 50mm square unmounted\u003c\/td\u003e\n\u003ctd\u003eQHY461PH, QHY600M-PH SBFL\u003c\/td\u003e\n\u003ctd\u003e21.5mm\u003c\/td\u003e\n\u003ctd\u003e10mm\u003c\/td\u003e\n\u003ctd\u003eAbout 1500g\u003c\/td\u003e\n\u003ctd\u003eSpecial adapter required when connecting QHY600 SBFL and CFW3XL.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003e\u003cstrong\u003eImportant Limitations\u003c\/strong\u003e\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter size must match the camera:\u003c\/strong\u003e Choosing a wheel that is too small for the sensor can cause vignetting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBack focus must be checked:\u003c\/strong\u003e Each model consumes a different amount of optical spacing and may require adapters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilters are not included:\u003c\/strong\u003e LRGB, narrowband, photometric, and specialty filters are purchased separately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot intended for visual observing:\u003c\/strong\u003e This is an astrophotography accessory for camera-based imaging systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot usually needed for one-shot colour cameras:\u003c\/strong\u003e The main use case is monochrome imaging, although some specialty OSC workflows may use filters differently.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCamera and adapter compatibility matters:\u003c\/strong\u003e Some QHY camera and filter wheel combinations require specific mechanical adapters.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h2\u003e\u003ch3\u003e\u003cstrong\u003eWhich QHY CFW3 model should I choose?\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eChoose the model based on your camera sensor size, filter size, wheel capacity, and available back focus. The S and M versions suit smaller and mid-size imaging systems, while the L and XL versions are better suited to larger sensors and larger filters.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCan the QHY CFW3 be used without a QHY camera?\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eYes. The filter wheel can be controlled through USB when used with compatible capture software, even if it is not connected through a QHY camera control port.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCan it be controlled directly by a QHY camera?\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eYes. Compatible QHY cameras with the QHY 4-pin filter wheel port can control the CFW3 through that connection, helping simplify the imaging train.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eDoes the QHY CFW3 include filters?\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eNo. The filter wheel does not include filters. Choose filters separately based on size, thread type, imaging target, and camera sensor coverage.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eIs this product for visual observing?\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eNo. This is an imaging accessory for astrophotography systems, especially monochrome camera setups.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWhen should this product not be recommended?\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eDo not recommend this filter wheel if the customer only uses a visual telescope, does not use a camera-based imaging system, or has not confirmed the correct filter size and back-focus requirements for their camera.\u003c\/p\u003e\u003ch2\u003e\u003cstrong\u003eOur Recommendation\u003c\/strong\u003e\u003c\/h2\u003e\u003cp\u003eOntario Telescope recommends the QHY CFW3 filter wheel family for astrophotographers building a monochrome imaging system and needing reliable automated filter changes. It is a strong choice for QHY camera users and for imagers who want a clean, software-controlled filter wheel for LRGB, narrowband, and specialty-filter workflows. Before ordering, confirm the exact filter size, camera sensor size, required adapters, and available back focus so the selected variant fits the imaging train correctly.\u003c\/p\u003e","brand":"QHYCCD","offers":[{"title":"QHYCFW3S-SR\/US","offer_id":53221828657263,"sku":"QHYCFW3S-SR\/US","price":365.19,"currency_code":"CAD","in_stock":true},{"title":"QHYCFW3M-SR\/US","offer_id":53221828690031,"sku":"QHYCFW3M-SR\/US","price":421.59,"currency_code":"CAD","in_stock":true},{"title":"QHYCFW3L","offer_id":53221828722799,"sku":"QHYCFW3L","price":604.89,"currency_code":"CAD","in_stock":true},{"title":"QHYCFW3XL","offer_id":53221828755567,"sku":"QHYCFW3XL","price":1126.59,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/20210526312.jpg?v=1781376585","url":"https:\/\/ontariotelescope.com\/products\/qhy-cfw3-motor-driven-electronic-filter-wheel","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}