{"title":"Filter Wheels \u0026 Drawers","description":null,"products":[{"product_id":"zwo-7-position-efw-7x2","title":"ZWO 7-Position EFW (7x2\") - Discontinued","description":"\u003ch3\u003eDescription:\u003c\/h3\u003e\n\u003cp\u003eThe filter wheel body is CNC milled from an aircraft graded aluminum block.\u003c\/p\u003e\n\u003cp\u003eExcellent craftsmanship, very thin and light with only 20mm thickness.\u003c\/p\u003e\n\u003cp\u003eThe core part of our EFW is the stepper motor which has reliable performance and quality that comes from NPM, Japan.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2″ Thread-In Filters or\u003c\/strong\u003e \u003cstrong\u003e50.4mm ±0.5mm Unmounted Filters can be used \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 2” Electronic Filter Wheel can be rotated in both counter clockwise and clockwise direction for filter selection.\u003c\/p\u003e\n\u003cp\u003eThere is no need of multiple cables to power this wheel up, just one USB cable does the trick. The maximum power supply of this EFW is approximately 120mAh @ 5V, which can be operated from the Cooled CCD’s USB2.0 port.\u003c\/p\u003e\n\u003cp\u003eWhen connected to ASI6200, the distance from the filter to the sensor is about 18mm\u003c\/p\u003e\n\u003cp\u003eOur 2″ RGBL filters are recommended to work with ASI6200MM Pro camera, it will offer nearly 1:1:1 RGB color balance.\u003c\/p\u003e\n\u003ch3 class=\"has-vivid-red-color has-text-color wp-block-heading\"\u003eWhat’s in the box?\u003c\/h3\u003e\n\u003cp\u003e1. FW2*7 body\u003cbr\u003e2. USB2.0 – 2m cable\u003cbr\u003e3. A bag of M2.5*6 screws (6pcs\/ bag)\u003cbr\u003e4. A bag of filter masks for 50mm filters (7pcs\/ bag)\u003cbr\u003e5. Phillips screwdriver\u003cbr\u003e6. A bag of M2*4 flat screws (23pcs\/ bag)\u003cbr\u003e7. M54M-M48F adapter\u003cbr\u003e8. M54M-M42F adapter\u003cbr\u003e9. Darkening ring sets(4pcs)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eSpecifications:\u003c\/h3\u003e\n\u003cp\u003eProduct weight: EFW 7 x 2″ = 650g\u003c\/p\u003e\n\u003cp\u003ePower supply: USB2.0\u003c\/p\u003e\n\u003cp\u003eControl Mode: ASCOM and SDK\u003c\/p\u003e\n\u003cp\u003eDriver: Free of driver\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":45334772416771,"sku":"ZWO-EFW-7x2","price":399.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/7557b4d3cfa16b1dfdb18d33200b11cc_fd0be3dc-f06e-4e9d-9cbe-f070a4837ae6.jpg?v=1775926486"},{"product_id":"zwo-filter-drawer-for-2-mounted-filter-m42","title":"ZWO M42 2\" Filter Drawer","description":"\u003ch3\u003e\n\u003cstrong\u003eDescription\u003c\/strong\u003e:\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eNew 2″ filter drawer featuring the anti-light-leaking design that can effectively solve the light leaking issue under long exposure.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"UTF-8\"\u003eDouble strong magnets adopted for stronger adsorption, easier installation and pulling out.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"UTF-8\"\u003eLock screw on the side for you to adjust the tension of the holder to eliminate gap. Double insurance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eSpecifications:\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eDiameter 70mm *Thickness 21mmM42 * 0.75 male(external) thread (camera side)M48 * 0.75 female(internal) thread (filter end)M48 * 0.75 female(internal) thread (telescope side)\u003c\/p\u003e\n\u003cp\u003eSuitable for 2-inch astronomical filters.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":45334806331651,"sku":"ZWO-FD-M42-II","price":79.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/c8412a7cde329a62ed009c8e6d8b4218.png?v=1771446197"},{"product_id":"zwo-filter-drawer-for-2-mounted-filter-m54","title":"ZWO M54 2\" Filter Drawer","description":"\u003ch3\u003eDescription:\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eNew 2″ filter drawer featuring the anti-light-leaking design that can effectively solve the light leaking issue under long exposure.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"UTF-8\"\u003eDouble strong magnets adopted for stronger adsorption, easier installation and pulling out.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"UTF-8\"\u003eLock screw on the side for you to adjust the tension of the holder to eliminate gap. Double insurance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eSpecifications:\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eDiameter 70mm * Thickness 20mm\u003c\/p\u003e\n\u003cp\u003eM54 * 0.75 male (external) thread (camera side)\u003c\/p\u003e\n\u003cp\u003eM48 * 0.75 female (internal) thread (filter end)\u003c\/p\u003e\n\u003cp\u003eM54 * 0.75 female (internal) thread (telescope side)\u003c\/p\u003e\n\u003cp\u003eSuitable for 2-inch astronomical filters and full frame cameras, such as ASI2600MC Duo, ASI6200 and ASI2400 series.\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":45334939238659,"sku":"ZWO-FD-M54-II","price":79.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/c75f30f2351b624fa4301d0b84bc54af.png?v=1757708116"},{"product_id":"zwo-filter-holder-for-m42-m54-and-eos-nikon-filter-drawer","title":"ZWO Filter Drawer 2\" Filter Holder","description":"\u003ch3\u003e\n\u003cstrong\u003eDescription\u003c\/strong\u003e:\u003c\/h3\u003e\n\u003cp\u003eZWO's M42 filter drawer includes one 2\" filter holder. However, you can purchase additional filter holders without having to buy the entire filter drawer all over again just for the holder.\u003c\/p\u003e\n\u003cp\u003eYou can now purchase as many filter holders as you need and slide in the appropriate filter into the drawer as you like. \u003c\/p\u003e\n\u003cp\u003eThe filter holder has standard M48x0.75 threads for 2\" mounted astronomy filters.\u003c\/p\u003e\n\u003cp\u003eThis new Gen 2 filter holder will fit \u003cstrong\u003eONLY\u003c\/strong\u003e the following ZWO filter drawers:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFD-M42-II Gen 2 M42\/M48 filter drawer\u003c\/li\u003e\n\u003cli\u003eFD-M54-II Gen 2 M54 filter drawer\u003c\/li\u003e\n\u003cli\u003eFD-EOS Canon EOS filter drawer\u003c\/li\u003e\n\u003cli\u003eFD-Nikon Nikon filter drawer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis new Gen 2 filter holder will \u003cstrong\u003eNOT\u003c\/strong\u003e fit the following ZWO filter drawers:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFD-M42 Gen 1 M42\/M48 filter drawer\u003c\/li\u003e\n\u003cli\u003eFD-M54 Gen 1 M54 filter drawer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eNote:the old filter holder is not applicable to the new filter drawer.\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":45334983213315,"sku":"ZWO-F-HLDR","price":35.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/paar-zw-f-hldr.jpg?v=1752702336"},{"product_id":"zwo-gen-1-filter-drawer-2-filter-holder","title":"Like New ZWO Gen 1 Filter Holder\/Drawer","description":"\u003ch3\u003e\n\u003cstrong\u003eDescription\u003c\/strong\u003e:\u003c\/h3\u003e\n\u003cp\u003eThis is a Generation 1 ZWO filter holder for 2\" filters - not the current Gen 2, so this will not fit in the current gen 2 filter drawer.  It has M48 threads.  This is in perfect, unmarked condition, and comes in a plastic box.  You reap the savings!  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eZWO's filter drawer includes one 2\" filter holder. However, you can purchase additional filter holders without having to buy the entire filter drawer all over again just for the holder.  You can now purchase as many filter holders as you need and slide in the appropriate filter into the drawer as you like.  The filter holder has standard M48x0.75 threads for 2\" mounted astronomy filters.\u003c\/p\u003e\n\u003cp\u003e   \u003c\/p\u003e\n\u003cp\u003eThis Gen 1 FD-M42 filter drawer has been discontinued and replaced by a\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/agenaastro.com\/zwo-filter-drawer-with-m42-m48-threads-for-2-filters-fd-m42-ii.html\" target=\"_blank\"\u003enew Gen 2 FD-M42 filter drawer\u003c\/a\u003e. The new version is functionally identical to this Gen 1 version. Only the mechanical housing specifications have changed, with the result that the Gen 2 filter holder will not work with this item.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eZWO’s filter drawer makes it easy to insert and remove a 2\" filter into your optical train between your camera and telescope. It uses a magnetic holder for a precise, secure, and repeatable fit. This device is perfect for imagers who want to quickly swap out filters without using large and heavy filter wheels.\u003c\/p\u003e\n\u003cp\u003eThe ZWO filter drawer holds a single mounted 2-inch filter with standard M48x0.75 threads. It includes an M42x0.75 external thread on the camera side, a M48x0.75 internal thread for the mounted filter itself, and a M48x0.75 internal thread on the telescope side. Also includes ZWO M48-M42 adapter that convert one side of the drawer so you can use it between two M42 threaded accessories or two M48 theaded accessories.  It also serves as a 21mm spacer to help achieve the correct backfocus distance without using a T2 extension ring. With a diameter of just 66mm, the ZWO filter drawer is also perfect for using in front of the optics of Hyperstar systems or Celestron RASA astrographs.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eIMPORTANT NOTE! This is for the first version of the ZWO M42 Filter Drawer that now has been replaced by the mark II version,  This filter holder is NOT COMPATIBLE with the Mark II version of the filter drawer. \u003c\/strong\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":47319469097219,"sku":"U2607-XXX-ZWO-F-HLDR","price":25.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/3deabc41-a4a7-4a15-b098-6b0da5d30374.jpg?v=1785260646"},{"product_id":"zwo-7-position-efw-7x2-2025","title":"ZWO 7-Position EFW (7x2\") 2025","description":"\u003ch3\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-1_31554de0-0100-463b-9a5e-603327911b45_jpg.webp?v=1765345570\" alt=\"\"\u003e\u003c\/h3\u003e\n\u003ch3\u003eThe Next-Generation ZWO EFW\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eRefined Design · Anti Light-Leak Protection · Built for Astrophotography\u003c\/strong\u003e\u003cbr\u003eA re-engineered internal design helps reduce light leakage, while the refined mechanics deliver smoother, more consistent rotation.\u003c\/p\u003e\n\u003cp\u003eThe exterior has been subtly streamlined, giving the wheel a cleaner and more cohesive look.\u003cbr\u003eNothing dramatic. Just better in the ways that matter — so your imaging workflow stays steady, reliable, and quietly improved.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-2_e6e24cd3-7c90-4e63-a9f9-7b4ca493af75_jpg.webp?v=1765345571\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe ZWO Electronic Filter Wheel (EFW) is available in four models, supporting the following filter sizes:\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø1.25\"\/31 mm filters\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø36 mm filters\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø2\" filters \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø50 mm square filters\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-3_jpg_97c3d3e3-ab06-483f-97fd-a24851607e97.webp?v=1765345648\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-4_jpg_e08d8b83-23ae-4ed6-98f6-982aae8c4583.webp?v=1765345648\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003ch4\u003eEngineered for full compatibility with all ZWO filters for dependable image quality.\u003cbr\u003e \u003cbr\u003ePower \u0026amp; Connectivity\u003c\/h4\u003e\n\u003ch4\u003eDraws only 120 mA at 5 V and runs entirely from a single USB  connection—no external power supply needed.\u003cbr\u003eConnects to your imaging system via the built-in USB-C port using the included USB 2.0 Type-A to Type-C cable.\u003cbr\u003e \u003cbr\u003eSoftware Support\u003c\/h4\u003e\n\u003ch4\u003eWorks seamlessly with ASIAIR, ASIStudio, ASCOM, and the ZWO SDK for flexible control across platforms.\u003cbr\u003e \u003cbr\u003eDriver-Free Design\u003c\/h4\u003e\n\u003cp\u003eTrue plug-and-play design with no driver installation required.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eAnti Light-Leak Design\u003c\/h3\u003e\n\u003cp\u003eIn deep-sky imaging, even small amounts of stray light can compromise your final image.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-5_jpg_d617cb85-fd32-471e-a4c3-1c240c6177ee.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe new ZWO EFW introduces a series of structural refinements to eliminate light leakage from all directions\u003cbr\u003e★ Upgraded Sealing Structure \u003cbr\u003eA re-engineered slot-fit chassis provides a tighter mechanical interface between the top and bottom covers, minimizing potential ingress points for stray light.\u003cbr\u003e★ Dual Light-Blocking Protection\u003cbr\u003eNewly added light-blocking pads on both lateral connection points creates additional optical barrier,  helping maintain clean, uniform frames during long integrations.\u003cbr\u003e★ Fully Enclosed Motor Compartment\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe motor assembly is now fully sealed, improving both light isolation and environmental resistance for more stable operation over time.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-6_jpg_b850fd15-96a0-43f7-b994-e3c8ced3c203.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eRefined Exterior Design\u003c\/h4\u003e\n\u003cp\u003eThe new ZWO EFW features a refined laser-engraved finish and cleaner logo detailing, offering improved visual clarity and a more modern, professional look.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-7_jpg_f0162d93-8bbc-4705-845c-d425c105f89f.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eInterface Upgrade\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW replaces the legacy USB Type-B connector with a modern USB-C interface, providing a more robust, reliable connection and simplifying plug-and-play integration with your imaging system.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-8_jpg_54a682a7-5225-4dff-b360-7751cd96904c.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eLightweight \u0026amp; Rigid\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW uses a CNC-machined aluminum alloy body for a lighter, more rigid structure.\u003cbr\u003eThe internal filter carousel is made from 6061 aluminum alloy, reducing weight while maintaining excellent strength and stability. The result is a compact, durable design engineered for smooth, reliable operation.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-9_jpg_a0290a28-b3ff-420c-969c-de6aeb5e41f0.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eStable \u0026amp; Durable\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW is equipped with a high-precision stepper motor, ensuring consistent rotation and stable operation across extended imaging sessions.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-10_jpg_c50ef723-d628-4a6a-86ee-e0d0444e455e.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eAutomated Filter Switching\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW features a motorized, bidirectional filter-wheel drive with precise position indexing. When paired with control software such as ASIAIR (sold separately), it enables automatic filter changes during a scheduled imaging session — enabling fully unattended, hands-free astrophotography.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-11_jpg_d56b7556-32bb-499e-93d7-15a943deb23e.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eConnection\u003c\/h3\u003e\n\u003cp\u003eZWO EFW-5x1.25-25\u003cbr\u003eZWO EFW-8x1.25-25\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-12_jpg_ff146725-e450-4067-8677-e0bf65eb2b78.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eZWO EFW-5x2-25\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eZWO EFW-7x2-25\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eZWO EFW-7x36-25\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-13_jpg_560bff0b-b322-401f-9a67-d7752f08c3f1.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e50mm 7 Slots\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-14_jpg_c5aab301-9083-4195-9aa6-28e9ae237aba.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eDiagram\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ZWO_EFW-7x2-25-17_jpg.webp?v=1765345576\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eWhat’s in the box?\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-22_jpg.webp?v=1765345586\"\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":47515667923203,"sku":"ZWO-EFW-7x2-25","price":399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/7X2.jpg?v=1765346593"},{"product_id":"zwo-5-position-efw-5x2-2025","title":"ZWO 5-Position EFW (5x2\") 2025","description":"\u003ch3\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-1_31554de0-0100-463b-9a5e-603327911b45_jpg.webp?v=1765345570\"\u003e\u003c\/h3\u003e\n\u003ch3\u003eThe Next-Generation ZWO EFW\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eRefined Design · Anti Light-Leak Protection · Built for Astrophotography\u003c\/strong\u003e\u003cbr\u003eA re-engineered internal design helps reduce light leakage, while the refined mechanics deliver smoother, more consistent rotation.\u003c\/p\u003e\n\u003cp\u003eThe exterior has been subtly streamlined, giving the wheel a cleaner and more cohesive look.\u003cbr\u003eNothing dramatic. Just better in the ways that matter — so your imaging workflow stays steady, reliable, and quietly improved.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-2_e6e24cd3-7c90-4e63-a9f9-7b4ca493af75_jpg.webp?v=1765345571\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe ZWO Electronic Filter Wheel (EFW) is available in four models, supporting the following filter sizes:\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø1.25\"\/31 mm filters\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø36 mm filters\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø2\" filters \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø50 mm square filters\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-3_jpg_97c3d3e3-ab06-483f-97fd-a24851607e97.webp?v=1765345648\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-4_jpg_e08d8b83-23ae-4ed6-98f6-982aae8c4583.webp?v=1765345648\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003ch4\u003eEngineered for full compatibility with all ZWO filters for dependable image quality.\u003cbr\u003e \u003cbr\u003ePower \u0026amp; Connectivity\u003c\/h4\u003e\n\u003ch4\u003eDraws only 120 mA at 5 V and runs entirely from a single USB  connection—no external power supply needed.\u003cbr\u003eConnects to your imaging system via the built-in USB-C port using the included USB 2.0 Type-A to Type-C cable.\u003cbr\u003e \u003cbr\u003eSoftware Support\u003c\/h4\u003e\n\u003ch4\u003eWorks seamlessly with ASIAIR, ASIStudio, ASCOM, and the ZWO SDK for flexible control across platforms.\u003cbr\u003e \u003cbr\u003eDriver-Free Design\u003c\/h4\u003e\n\u003cp\u003eTrue plug-and-play design with no driver installation required.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eAnti Light-Leak Design\u003c\/h3\u003e\n\u003cp\u003eIn deep-sky imaging, even small amounts of stray light can compromise your final image.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-5_jpg_d617cb85-fd32-471e-a4c3-1c240c6177ee.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe new ZWO EFW introduces a series of structural refinements to eliminate light leakage from all directions\u003cbr\u003e★ Upgraded Sealing Structure \u003cbr\u003eA re-engineered slot-fit chassis provides a tighter mechanical interface between the top and bottom covers, minimizing potential ingress points for stray light.\u003cbr\u003e★ Dual Light-Blocking Protection\u003cbr\u003eNewly added light-blocking pads on both lateral connection points creates additional optical barrier,  helping maintain clean, uniform frames during long integrations.\u003cbr\u003e★ Fully Enclosed Motor Compartment\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe motor assembly is now fully sealed, improving both light isolation and environmental resistance for more stable operation over time.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-6_jpg_b850fd15-96a0-43f7-b994-e3c8ced3c203.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eRefined Exterior Design\u003c\/h4\u003e\n\u003cp\u003eThe new ZWO EFW features a refined laser-engraved finish and cleaner logo detailing, offering improved visual clarity and a more modern, professional look.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-7_jpg_f0162d93-8bbc-4705-845c-d425c105f89f.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003ch3\u003eInterface Upgrade\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW replaces the legacy USB Type-B connector with a modern USB-C interface, providing a more robust, reliable connection and simplifying plug-and-play integration with your imaging system.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-8_jpg_54a682a7-5225-4dff-b360-7751cd96904c.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003ch3\u003eLightweight \u0026amp; Rigid\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW uses a CNC-machined aluminum alloy body for a lighter, more rigid structure.\u003cbr\u003eThe internal filter carousel is made from 6061 aluminum alloy, reducing weight while maintaining excellent strength and stability. The result is a compact, durable design engineered for smooth, reliable operation.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-9_jpg_a0290a28-b3ff-420c-969c-de6aeb5e41f0.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003ch3\u003eStable \u0026amp; Durable\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW is equipped with a high-precision stepper motor, ensuring consistent rotation and stable operation across extended imaging sessions.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-10_jpg_c50ef723-d628-4a6a-86ee-e0d0444e455e.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003ch3\u003eAutomated Filter Switching\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW features a motorized, bidirectional filter-wheel drive with precise position indexing. When paired with control software such as ASIAIR (sold separately), it enables automatic filter changes during a scheduled imaging session — enabling fully unattended, hands-free astrophotography.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-11_jpg_d56b7556-32bb-499e-93d7-15a943deb23e.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003ch3\u003eConnection\u003c\/h3\u003e\n\u003cp\u003eZWO EFW-5x1.25-25\u003cbr\u003eZWO EFW-8x1.25-25\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-12_jpg_ff146725-e450-4067-8677-e0bf65eb2b78.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eZWO EFW-5x2-25\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eZWO EFW-7x2-25\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eZWO EFW-7x36-25\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-13_jpg_560bff0b-b322-401f-9a67-d7752f08c3f1.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e50mm 7 Slots\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-14_jpg_c5aab301-9083-4195-9aa6-28e9ae237aba.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003ch3\u003eDiagram\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ZWO_EFW-5x2-25-16_jpg_763739a6-e74c-4be2-9f4e-0f634ad3d9df.webp?v=1765346456\"\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat’s in the box?\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-22_jpg_dee65122-f797-4120-a5bc-a1c487e5a1f4.webp?v=1765346468\"\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":47515669496067,"sku":"ZWO-EFW-5x2-25","price":299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/5X2.jpg?v=1765346451"},{"product_id":"zwo-5-position-efw-5x1-25-2025","title":"ZWO 5-Position EFW (5x1.25\") 2025","description":"\u003ch3\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-1_31554de0-0100-463b-9a5e-603327911b45_jpg.webp?v=1765345570\" alt=\"\"\u003eThe Next-Generation ZWO EFW\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eRefined Design · Anti Light-Leak Protection · Built for Astrophotography\u003c\/strong\u003e\u003cbr\u003eA re-engineered internal design helps reduce light leakage, while the refined mechanics deliver smoother, more consistent rotation.\u003c\/p\u003e\n\u003cp\u003eThe exterior has been subtly streamlined, giving the wheel a cleaner and more cohesive look.\u003cbr\u003eNothing dramatic. Just better in the ways that matter — so your imaging workflow stays steady, reliable, and quietly improved.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-2_e6e24cd3-7c90-4e63-a9f9-7b4ca493af75_jpg.webp?v=1765345571\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe ZWO Electronic Filter Wheel (EFW) is available in four models, supporting the following filter sizes:\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø1.25\"\/31 mm filters\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø36 mm filters\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø2\" filters \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø50 mm square filters\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-3_jpg_97c3d3e3-ab06-483f-97fd-a24851607e97.webp?v=1765345648\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-4_jpg_e08d8b83-23ae-4ed6-98f6-982aae8c4583.webp?v=1765345648\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003ch4\u003eEngineered for full compatibility with all ZWO filters for dependable image quality.\u003cbr\u003e \u003cbr\u003ePower \u0026amp; Connectivity\u003c\/h4\u003e\n\u003ch4\u003eDraws only 120 mA at 5 V and runs entirely from a single USB  connection—no external power supply needed.\u003cbr\u003eConnects to your imaging system via the built-in USB-C port using the included USB 2.0 Type-A to Type-C cable.\u003cbr\u003e \u003cbr\u003eSoftware Support\u003c\/h4\u003e\n\u003ch4\u003eWorks seamlessly with ASIAIR, ASIStudio, ASCOM, and the ZWO SDK for flexible control across platforms.\u003cbr\u003e \u003cbr\u003eDriver-Free Design\u003c\/h4\u003e\n\u003cp\u003eTrue plug-and-play design with no driver installation required.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eAnti Light-Leak Design\u003c\/h3\u003e\n\u003cp\u003eIn deep-sky imaging, even small amounts of stray light can compromise your final image.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-5_jpg_d617cb85-fd32-471e-a4c3-1c240c6177ee.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe new ZWO EFW introduces a series of structural refinementsd to eliminate light leakage from all directions\u003cbr\u003e★ Upgraded Sealing Structure \u003cbr\u003eA re-engineered slot-fit chassis provides a tighter mechanical interface between the top and bottom covers, minimizing potential ingress points for stray light.\u003cbr\u003e★ Dual Light-Blocking Protection\u003cbr\u003eNewly added light-blocking pads on both lateral connection points creates additional optical barrier,  helping maintain clean, uniform frames during long integrations.\u003cbr\u003e★ Fully Enclosed Motor Compartment\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe motor assembly is now fully sealed, improving both light isolation and environmental resistance for more stable operation over time.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-6_jpg_b850fd15-96a0-43f7-b994-e3c8ced3c203.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eRefined Exterior Design\u003c\/h4\u003e\n\u003cp\u003eThe new ZWO EFW features a refined laser-engraved finish and cleaner logo detailing, offering improved visual clarity and a more modern, professional look.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-7_jpg_f0162d93-8bbc-4705-845c-d425c105f89f.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eInterface Upgrade\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW replaces the legacy USB Type-B connector with a modern USB-C interface, providing a more robust, reliable connection and simplifying plug-and-play integration with your imaging system.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-8_jpg_54a682a7-5225-4dff-b360-7751cd96904c.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eLightweight \u0026amp; Rigid\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW uses a CNC-machined aluminum alloy body for a lighter, more rigid structure.\u003cbr\u003eThe internal filter carousel is made from 6061 aluminum alloy, reducing weight while maintaining excellent strength and stability. The result is a compact, durable design engineered for smooth, reliable operation.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-9_jpg_a0290a28-b3ff-420c-969c-de6aeb5e41f0.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eStable \u0026amp; Durable\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW is equipped with a high-precision stepper motor, ensuring consistent rotation and stable operation across extended imaging sessions.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-10_jpg_c50ef723-d628-4a6a-86ee-e0d0444e455e.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eAutomated Filter Switching\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW features a motorized, bidirectional filter-wheel drive with precise position indexing. When paired with control software such as ASIAIR (sold separately), it enables automatic filter changes during a scheduled imaging session — enabling fully unattended, hands-free astrophotography.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-11_jpg_d56b7556-32bb-499e-93d7-15a943deb23e.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eConnection\u003c\/h3\u003e\n\u003cp\u003eZWO EFW-5x1.25-25\u003cbr\u003eZWO EFW-8x1.25-25\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-12_jpg_ff146725-e450-4067-8677-e0bf65eb2b78.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eZWO EFW-5x2-25\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eZWO EFW-7x2-25\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eZWO EFW-7x36-25\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-13_jpg_560bff0b-b322-401f-9a67-d7752f08c3f1.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e50mm 7 Slots\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-14_jpg_c5aab301-9083-4195-9aa6-28e9ae237aba.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eDiagram\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ZWO_EFW-5x1_25-25-15_jpg_c89485c1-7623-4fd5-be91-948570676f71.webp?v=1765346389\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat’s in the box?\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW21_jpg.webp?v=1765346399\" alt=\"\"\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":47515677196547,"sku":"ZWO-EFW-5x1.25-25","price":199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/5X1.25.jpg?v=1765346339"},{"product_id":"zwo-7-position-efw-7x36mm-2025","title":"ZWO 7-Position EFW (7x36mm) 2025","description":"\u003ch3\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-1_31554de0-0100-463b-9a5e-603327911b45_jpg.webp?v=1765345570\" alt=\"\"\u003eThe Next-Generation ZWO EFW\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eRefined Design · Anti Light-Leak Protection · Built for Astrophotography\u003c\/strong\u003e\u003cbr\u003eA re-engineered internal design helps reduce light leakage, while the refined mechanics deliver smoother, more consistent rotation.\u003c\/p\u003e\n\u003cp\u003eThe exterior has been subtly streamlined, giving the wheel a cleaner and more cohesive look.\u003cbr\u003eNothing dramatic. Just better in the ways that matter — so your imaging workflow stays steady, reliable, and quietly improved.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-2_e6e24cd3-7c90-4e63-a9f9-7b4ca493af75_jpg.webp?v=1765345571\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe ZWO Electronic Filter Wheel (EFW) is available in four models, supporting the following filter sizes:\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø1.25\"\/31 mm filters\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø36 mm filters\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø2\" filters \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø50 mm square filters\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-3_jpg_97c3d3e3-ab06-483f-97fd-a24851607e97.webp?v=1765345648\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-4_jpg_e08d8b83-23ae-4ed6-98f6-982aae8c4583.webp?v=1765345648\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003ch4\u003eEngineered for full compatibility with all ZWO filters for dependable image quality.\u003cbr\u003e \u003cbr\u003ePower \u0026amp; Connectivity\u003c\/h4\u003e\n\u003ch4\u003eDraws only 120 mA at 5 V and runs entirely from a single USB  connection—no external power supply needed.\u003cbr\u003eConnects to your imaging system via the built-in USB-C port using the included USB 2.0 Type-A to Type-C cable.\u003cbr\u003e \u003cbr\u003eSoftware Support\u003c\/h4\u003e\n\u003ch4\u003eWorks seamlessly with ASIAIR, ASIStudio, ASCOM, and the ZWO SDK for flexible control across platforms.\u003cbr\u003e \u003cbr\u003eDriver-Free Design\u003c\/h4\u003e\n\u003cp\u003eTrue plug-and-play design with no driver installation required.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eAnti Light-Leak Design\u003c\/h3\u003e\n\u003cp\u003eIn deep-sky imaging, even small amounts of stray light can compromise your final image.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-5_jpg_d617cb85-fd32-471e-a4c3-1c240c6177ee.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe new ZWO EFW introduces a series of structural refinements to eliminate light leakage from all directions\u003cbr\u003e★ Upgraded Sealing Structure \u003cbr\u003eA re-engineered slot-fit chassis provides a tighter mechanical interface between the top and bottom covers, minimizing potential ingress points for stray light.\u003cbr\u003e★ Dual Light-Blocking Protection\u003cbr\u003eNewly added light-blocking pads on both lateral connection points creates additional optical barrier,  helping maintain clean, uniform frames during long integrations.\u003cbr\u003e★ Fully Enclosed Motor Compartment\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe motor assembly is now fully sealed, improving both light isolation and environmental resistance for more stable operation over time.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-6_jpg_b850fd15-96a0-43f7-b994-e3c8ced3c203.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eRefined Exterior Design\u003c\/h4\u003e\n\u003cp\u003eThe new ZWO EFW features a refined laser-engraved finish and cleaner logo detailing, offering improved visual clarity and a more modern, professional look.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-7_jpg_f0162d93-8bbc-4705-845c-d425c105f89f.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eInterface Upgrade\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW replaces the legacy USB Type-B connector with a modern USB-C interface, providing a more robust, reliable connection and simplifying plug-and-play integration with your imaging system.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-8_jpg_54a682a7-5225-4dff-b360-7751cd96904c.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eLightweight \u0026amp; Rigid\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW uses a CNC-machined aluminum alloy body for a lighter, more rigid structure.\u003cbr\u003eThe internal filter carousel is made from 6061 aluminum alloy, reducing weight while maintaining excellent strength and stability. The result is a compact, durable design engineered for smooth, reliable operation.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-9_jpg_a0290a28-b3ff-420c-969c-de6aeb5e41f0.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eStable \u0026amp; Durable\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW is equipped with a high-precision stepper motor, ensuring consistent rotation and stable operation across extended imaging sessions.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-10_jpg_c50ef723-d628-4a6a-86ee-e0d0444e455e.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eAutomated Filter Switching\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW features a motorized, bidirectional filter-wheel drive with precise position indexing. When paired with control software such as ASIAIR (sold separately), it enables automatic filter changes during a scheduled imaging session — enabling fully unattended, hands-free astrophotography.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-11_jpg_d56b7556-32bb-499e-93d7-15a943deb23e.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eConnection\u003c\/h3\u003e\n\u003cp\u003eZWO EFW-5x1.25-25\u003cbr\u003eZWO EFW-8x1.25-25\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-12_jpg_ff146725-e450-4067-8677-e0bf65eb2b78.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eZWO EFW-5x2-25\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eZWO EFW-7x2-25\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eZWO EFW-7x36-25\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-13_jpg_560bff0b-b322-401f-9a67-d7752f08c3f1.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e50mm 7 Slots\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-14_jpg_c5aab301-9083-4195-9aa6-28e9ae237aba.webp?v=1765345648\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eDiagram\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ZWO_EFW-7x36-25-18_jpg.webp?v=1765346240\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat’s in the box?\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-23_jpg.webp?v=1765346247\" alt=\"\"\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":47515683291395,"sku":"ZWO-EFW-7x36-25","price":299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/7X36.jpg?v=1765346217"},{"product_id":"zwo-8-position-efw-8x1-25-2025","title":"ZWO 8-Position EFW (8x1.25\") 2025","description":"\u003ch3\u003e\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-1_31554de0-0100-463b-9a5e-603327911b45_jpg.webp?v=1765345570\"\u003eThe Next-Generation ZWO EFW\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eRefined Design · Anti Light-Leak Protection · Built for Astrophotography\u003c\/strong\u003e\u003cbr\u003eA re-engineered internal design helps reduce light leakage, while the refined mechanics deliver smoother, more consistent rotation.\u003c\/p\u003e\n\u003cp\u003eThe exterior has been subtly streamlined, giving the wheel a cleaner and more cohesive look.\u003cbr\u003eNothing dramatic. Just better in the ways that matter — so your imaging workflow stays steady, reliable, and quietly improved.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-2_e6e24cd3-7c90-4e63-a9f9-7b4ca493af75_jpg.webp?v=1765345571\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe ZWO Electronic Filter Wheel (EFW) is available in four models, supporting the following filter sizes:\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø1.25\"\/31 mm filters\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø36 mm filters\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø2\" filters \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  Ø50 mm square filters\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-3_jpg_97c3d3e3-ab06-483f-97fd-a24851607e97.webp?v=1765345648\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-4_jpg_e08d8b83-23ae-4ed6-98f6-982aae8c4583.webp?v=1765345648\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003ch4\u003eEngineered for full compatibility with all ZWO filters for dependable image quality.\u003cbr\u003e \u003cbr\u003ePower \u0026amp; Connectivity\u003c\/h4\u003e\n\u003ch4\u003eDraws only 120 mA at 5 V and runs entirely from a single USB  connection—no external power supply needed.\u003cbr\u003eConnects to your imaging system via the built-in USB-C port using the included USB 2.0 Type-A to Type-C cable.\u003cbr\u003e \u003cbr\u003eSoftware Support\u003c\/h4\u003e\n\u003ch4\u003eWorks seamlessly with ASIAIR, ASIStudio, ASCOM, and the ZWO SDK for flexible control across platforms.\u003cbr\u003e \u003cbr\u003eDriver-Free Design\u003c\/h4\u003e\n\u003cp\u003eTrue plug-and-play design with no driver installation required.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eAnti Light-Leak Design\u003c\/h3\u003e\n\u003cp\u003eIn deep-sky imaging, even small amounts of stray light can compromise your final image.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-5_jpg_d617cb85-fd32-471e-a4c3-1c240c6177ee.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe new ZWO EFW introduces a series of structural refinements to eliminate light leakage from all directions\u003cbr\u003e★ Upgraded Sealing Structure \u003cbr\u003eA re-engineered slot-fit chassis provides a tighter mechanical interface between the top and bottom covers, minimizing potential ingress points for stray light.\u003cbr\u003e★ Dual Light-Blocking Protection\u003cbr\u003eNewly added light-blocking pads on both lateral connection points creates additional optical barrier,  helping maintain clean, uniform frames during long integrations.\u003cbr\u003e★ Fully Enclosed Motor Compartment\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe motor assembly is now fully sealed, improving both light isolation and environmental resistance for more stable operation over time.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-6_jpg_b850fd15-96a0-43f7-b994-e3c8ced3c203.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eRefined Exterior Design\u003c\/h4\u003e\n\u003cp\u003eThe new ZWO EFW features a refined laser-engraved finish and cleaner logo detailing, offering improved visual clarity and a more modern, professional look.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-7_jpg_f0162d93-8bbc-4705-845c-d425c105f89f.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003ch3\u003eInterface Upgrade\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW replaces the legacy USB Type-B connector with a modern USB-C interface, providing a more robust, reliable connection and simplifying plug-and-play integration with your imaging system.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-8_jpg_54a682a7-5225-4dff-b360-7751cd96904c.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003ch3\u003eLightweight \u0026amp; Rigid\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW uses a CNC-machined aluminum alloy body for a lighter, more rigid structure.\u003cbr\u003eThe internal filter carousel is made from 6061 aluminum alloy, reducing weight while maintaining excellent strength and stability. The result is a compact, durable design engineered for smooth, reliable operation.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-9_jpg_a0290a28-b3ff-420c-969c-de6aeb5e41f0.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003ch3\u003eStable \u0026amp; Durable\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW is equipped with a high-precision stepper motor, ensuring consistent rotation and stable operation across extended imaging sessions.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-10_jpg_c50ef723-d628-4a6a-86ee-e0d0444e455e.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003ch3\u003eAutomated Filter Switching\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW features a motorized, bidirectional filter-wheel drive with precise position indexing. When paired with control software such as ASIAIR (sold separately), it enables automatic filter changes during a scheduled imaging session — enabling fully unattended, hands-free astrophotography.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-11_jpg_d56b7556-32bb-499e-93d7-15a943deb23e.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003ch3\u003eConnection\u003c\/h3\u003e\n\u003cp\u003eZWO EFW-5x1.25-25\u003cbr\u003eZWO EFW-8x1.25-25\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-12_jpg_ff146725-e450-4067-8677-e0bf65eb2b78.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eZWO EFW-5x2-25\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eZWO EFW-7x2-25\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eZWO EFW-7x36-25\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-13_jpg_560bff0b-b322-401f-9a67-d7752f08c3f1.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e50mm 7 Slots\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW-14_jpg_c5aab301-9083-4195-9aa6-28e9ae237aba.webp?v=1765345648\"\u003e\u003c\/p\u003e\n\u003ch3\u003eDiagram\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ZWO_EFW-8x1_25-25-19_jpg.webp?v=1765345663\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eWhat’s in the box?\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/EFW_8x1_25_jpg.webp?v=1765345675\"\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":47515688534275,"sku":"ZWO-EFW-8x1.25-25","price":299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/8X1.25.jpg?v=1765346163"},{"product_id":"like-new-zwo-7-position-efw-7x2-not-2025-model-missing-pieces","title":"Like New ZWO 7-Position EFW (7x2\") - (Not 2025 model) - missing accessories","description":"\u003cp\u003eThis is a like new ZWO 7x2\" filter wheel - it is completely unmarked and pristine, in perfect condition.  This is not the newer 2025 version; this is the previous version, now discontinued.  The previous owner brought in a number of \"used\" items that turned out not to be used at all, and we think that he never used this one either. \u003c\/p\u003e\n\u003cp\u003eHowever, there are a number of ancillary parts that normally come with this EFW - screws, filter masks, adapters - that are not included.  See the third photo, which shows all of these items.  This includes the USB cables, and will still work without these other accessories, but these items are necessary if you have special circumstances.  Because you will need to procure these items yourself, we have heavily discounted this item from its new price:  save \u003cstrong\u003eTWO HUNDRED DOLLARS\u003c\/strong\u003e off of a brand new one.  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eDescription:\u003c\/h3\u003e\n\u003cp\u003eThe filter wheel body is CNC milled from an aircraft graded aluminum block.\u003c\/p\u003e\n\u003cp\u003eExcellent craftsmanship, very thin and light with only 20mm thickness.\u003c\/p\u003e\n\u003cp\u003eThe core part of our EFW is the stepper motor which has reliable performance and quality that comes from NPM, Japan.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2″ Thread-In Filters or\u003c\/strong\u003e \u003cstrong\u003e50.4mm ±0.5mm Unmounted Filters can be used \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 2” Electronic Filter Wheel can be rotated in both counter clockwise and clockwise direction for filter selection.\u003c\/p\u003e\n\u003cp\u003eThere is no need of multiple cables to power this wheel up, just one USB cable does the trick. The maximum power supply of this EFW is approximately 120mAh @ 5V, which can be operated from the Cooled CCD’s USB2.0 port.\u003c\/p\u003e\n\u003cp\u003eWhen connected to ASI6200, the distance from the filter to the sensor is about 18mm\u003c\/p\u003e\n\u003cp\u003eOur 2″ RGBL filters are recommended to work with ASI6200MM Pro camera, it will offer nearly 1:1:1 RGB color balance.\u003c\/p\u003e\n\u003ch3 class=\"has-vivid-red-color has-text-color wp-block-heading\"\u003eWhat’s in the box?\u003c\/h3\u003e\n\u003cp\u003e1. FW2*7 body\u003cbr\u003e2. USB2.0 – 2m cable\u003cbr\u003e3. A bag of M2.5*6 screws (6pcs\/ bag) - NOT INCLUDED\u003cbr\u003e4. A bag of filter masks for 50mm filters (7pcs\/ bag) - NOT INCLUDED\u003cbr\u003e5. Phillips screwdriver - NOT INCLUDED\u003cbr\u003e6. A bag of M2*4 flat screws (23pcs\/ bag) - NOT INCLUDED\u003cbr\u003e7. M54M-M48F adapter - NOT INCLUDED\u003cbr\u003e8. M54M-M42F adapter - NOT INCLUDED\u003cbr\u003e9. Darkening ring sets(4pcs) - NOT INCLUDED\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eSpecifications:\u003c\/h3\u003e\n\u003cp\u003eProduct weight: EFW 7 x 2″ = 650g\u003c\/p\u003e\n\u003cp\u003ePower supply: USB2.0\u003c\/p\u003e\n\u003cp\u003eControl Mode: ASCOM and SDK\u003c\/p\u003e\n\u003cp\u003eDriver: Free of driver\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":49570983248131,"sku":"U2608-BM-ZWO-EFW-7x2","price":200.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/7557b4d3cfa16b1dfdb18d33200b11cc_fd0be3dc-f06e-4e9d-9cbe-f070a4837ae6.jpg?v=1775926486"}],"url":"https:\/\/milehighastro.com\/collections\/filter-wheels-drawers.oembed","provider":"Mile High Astronomy","version":"1.0","type":"link"}