{"product_id":"zwo-7-slot-efw-for-2-filters-zwo-efw-7x2-25","title":"ZWO 7-Slot EFW for 2\" Filters (ZWO-EFW-7x2-25)","description":"\u003ch3\u003eThe Next Evolution in Precision Filter Control\u003c\/h3\u003e\n\u003cp\u003eThe new ZWO EFW brings a fully re-engineered internal structure designed to minimize stray light, stabilize rotation, and deliver more uniform imaging performance. With improved mechanical fit, enhanced sealing, and smoother motor-driven movement, it ensures consistency frame after frame. A streamlined exterior and modern connectivity make integration easier than ever, providing a dependable, low-maintenance solution for astrophotographers who need accuracy, reliability, and flawless data quality across every filter change.\u003c\/p\u003e\n\u003ch3\u003eThe Next-Generation ZWO EFW\u003c\/h3\u003e\n\u003ch4\u003eRefinded Design | Anti Light-Leak Protection | Built for Astrophotography\u003c\/h4\u003e\n\u003cp\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. Nothing dramatic. Just better in the ways that matter — so your imaging workflow stays steady, reliable, and quietly improved.\u003c\/p\u003e\n\u003ch4\u003eThe ZWO Electronic Filter Wheel (EFW) is available in four models, supporting the following filter sizes:\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\/Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eEFW (⌀ 1.25\"\/31mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eEFW (⌀ 2\")\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEFW (⌀ 36mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEFW (50mmx50mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eZWO-EFW-8x1.25-25\u003c\/td\u003e\n\u003ctd\u003eZWO-EFW-5x1.25-25\u003c\/td\u003e\n\u003ctd\u003eZWO-EFW-7x2-25\u003c\/td\u003e\n\u003ctd\u003eZWO-EFW-5x2-25\u003c\/td\u003e\n\u003ctd\u003eZWO-EFW-7x36-25\u003c\/td\u003e\n\u003ctd\u003eZWO-EFW-7x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlots\u003c\/td\u003e\n\u003ctd\u003e8 Slots\u003c\/td\u003e\n\u003ctd\u003e5 Slots (Mini)\u003c\/td\u003e\n\u003ctd\u003e7 Slots\u003c\/td\u003e\n\u003ctd\u003e5 Slots\u003c\/td\u003e\n\u003ctd\u003e7 Slots\u003c\/td\u003e\n\u003ctd\u003e7 Slots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003ctd\u003e15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e1.25\" mounted (thickness ≤7mm)\u003cbr\u003e31mm unmounted (thickness 1.5-3.5mm)\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e2\" mounted (thickness ≤7mm)\u003cbr\u003e50mm unmounted (thickness 1.5-3.5mm)\u003c\/td\u003e\n\u003ctd\u003e36mm unmounted (thickness 1.9-3.5mm)\u003c\/td\u003e\n\u003ctd\u003e50x50x3mm square (thickness 3-4mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e530g\u003c\/td\u003e\n\u003ctd\u003e300g\u003c\/td\u003e\n\u003ctd\u003e720g\u003c\/td\u003e\n\u003ctd\u003e540g\u003c\/td\u003e\n\u003ctd\u003e515g\u003c\/td\u003e\n\u003ctd\u003e886g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for full compatibility with all ZWO filters for dependable image quality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower \u0026amp; Connectivity:\u003c\/strong\u003e Draws only 120 mA at 5 V and runs entirely from a single USB  connection—no external power supply needed. Connects to your imaging system via the built-in USB-C port using the included USB 2.0 Type-A to Type-C cable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoftware Support:\u003c\/strong\u003e Works seamlessly with ASIAIR, ASIStudio, ASCOM, and the ZWO SDK for flexible control across platforms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDriver-Free Design:\u003c\/strong\u003e True plug-and-play design with no driver installation required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnti Light-Leak Design:\u003c\/strong\u003e In deep-sky imaging, even small amounts of stray light can compromise your final image.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eThe New ZWO EFW Introduces a Series of Structural Refinements to Eliminate Light Leakage from All Directions\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Sealing Structure:\u003c\/strong\u003e A re-engineered slot-fit chassis provides a tighter mechanical interface between the top and bottom covers, minimizing potential ingress points for stray light\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Light-Blocking Protection:\u003c\/strong\u003e Newly added light-blocking pads on both lateral connection points creates additional optical barrier,  helping maintain clean, uniform frames during long integrations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Enclosed Motor Compartment:\u003c\/strong\u003e The motor assembly is now fully sealed, improving both light isolation and environmental resistance for more stable operation over time\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/EFW-6.webp?v=1765432317\"\u003e\u003c\/p\u003e\n\u003ch4\u003eOther Changes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefined Exterior Design:\u003c\/strong\u003e The new ZWO EFW features a refined laser-engraved finish and cleaner logo detailing, offering improved visual clarity and a more modern, professional look.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterface Upgrade:\u003c\/strong\u003e The 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\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight \u0026amp; Rigid:\u003c\/strong\u003e The new ZWO EFW uses a CNC-machined aluminum alloy body for a lighter, more rigid structure. The 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStable \u0026amp; Durable:\u003c\/strong\u003e The new ZWO EFW is equipped with a high-precision stepper motor, ensuring consistent rotation and stable operation across extended imaging sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomated Filter Switching:\u003c\/strong\u003e The 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\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/ZWO-EFW-7x2-25-DIMENSIONS.jpg?v=1765439149\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eConnection Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/EFW-25-BACKFOCUS-2.jpg?v=1765439090\" alt=\"\"\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":48595136315644,"sku":"ZWO EFW-7x2-25","price":559.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/EFW-7X2-25.jpg?v=1765439163","url":"https:\/\/all-startelescope.com\/products\/zwo-7-slot-efw-for-2-filters-zwo-efw-7x2-25","provider":"All-Star Telescope Canada","version":"1.0","type":"link"}