{"product_id":"ioptron-3382","title":"iOptron iEFW-18, 8-Filter Electronic Filter Wheel for 1.25'' or 31mm Filters","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eHolds up to 8 filters\u003c\/li\u003e\n\u003cli\u003eCompatible with 1.25\" mounted filters\u003c\/li\u003e\n\u003cli\u003eCompatible with 31mm unmounted filters\u003c\/li\u003e\n\u003cli\u003eElectronic control for automated imaging\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eiEFW-18, 8-Filter Electronic Filter Wheel for 1.25'' or 31mm Filters\u003c\/h2\u003e\n\u003cp\u003eThe iOptron iEFW-18 electronic filter wheel integrates into your imaging train to provide automated selection between 8 different 1.25-inch mounted or 31mm unmounted filters. This core capability enables multi-channel LRGB and narrowband imaging sequences without manual intervention during a session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e8-Position Carousel for 1.25\" or 31mm Filters\u003c\/h3\u003e\n\u003cp\u003eThe internal carousel is designed with 8 positions to accommodate a complete LRGB and narrowband filter set in a single device. It accepts both standard 1.25\" mounted filters and 31mm unmounted filters, giving you flexibility in choosing your optical components and minimizing potential vignetting with faster optical systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAutomated Filter Selection for Remote Imaging\u003c\/h3\u003e\n\u003cp\u003eAs an electronic filter wheel, the iEFW-18 is built for software control, allowing your imaging application to automatically switch filters as part of a pre-planned sequence. This is essential for robotic or remote observatories and maximizes efficiency for any backyard setup by eliminating the need to physically touch the telescope to change from a Luminance to a Hydrogen-alpha filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat types of filters can I install in the iEFW-18 filter wheel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe iOptron iEFW-18 is designed to hold up to \u003cstrong\u003e8 filters\u003c\/strong\u003e in two common formats. You can use standard \u003cstrong\u003e1.25\" mounted filters\u003c\/strong\u003e (with M28.5 threads) or \u003cstrong\u003e31mm unmounted filters\u003c\/strong\u003e, making it compatible with a wide range of products for LRGB, narrowband, and photometric imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the iEFW-18 improve astrophotography with a monochrome camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe iEFW-18 automates one of the most repetitive tasks in monochrome astrophotography: changing filters. By allowing software to control filter changes, you can program an entire night's imaging plan to capture Luminance, Red, Green, Blue, and even narrowband data sequentially without any manual intervention, ensuring consistent focus and framing between channels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the iEFW-18 for LRGB imaging of the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the iEFW-18 is ideal for this purpose. You can load it with Luminance, Red, Green, and Blue filters and program your capture software to automatically cycle through them. This allows you to gather all the data needed for a full-color image of M31 in a single, automated session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the iEFW-18 a good choice for narrowband imaging of the Orion Nebula (M42) from the city?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The iEFW-18 allows you to load H-alpha, OIII, and SII narrowband filters to isolate specific wavelengths of light from emission nebulae like M42. This technique is highly effective at cutting through light pollution, and the automated nature of the wheel means you can capture long, uninterrupted sequences on each filter to maximize signal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of using 31mm unmounted filters over 1.25\" filters in the iEFW-18?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eUsing \u003cstrong\u003e31mm unmounted filters\u003c\/strong\u003e can provide a larger clear aperture compared to the housing of a 1.25\" filter. This can help reduce vignetting (darkening of the corners of the image), especially when used with telescopes that have a fast focal ratio or cameras with larger sensors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the iEFW-18 filter wheel controlled by a computer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe iEFW-18 connects to your computer, typically via USB, and is controlled through standard astronomy drivers like ASCOM or INDI. This allows it to integrate seamlessly with most popular astrophotography software such as N.I.N.A., Sequence Generator Pro, or TheSkyX, which can then command filter changes as part of an imaging plan.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$289.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailability\u003c\/td\u003e\n\u003ctd\u003eBackorder in N. Amer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Code\u003c\/td\u003e\n\u003ctd\u003e3382\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBox contents are not available for this product.\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/ioptron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eiOptron Warranty Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"iOptron","offers":[{"title":"Default Title","offer_id":52917291155741,"sku":"IOP-3382","price":289.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/iOptron-iEFW-18-8-Filter-Electronic-Filter-Wheel-for-1-25-or-31mm-Filters-1_0c675bfc-f9c0-40c5-9a0f-e7f89d82edea.jpg?v=1789142042","url":"https:\/\/davidastro.com\/en-us\/products\/ioptron-3382","provider":"David Astro","version":"1.0","type":"link"}