{"title":"Roues à filtres électroniques iOptron iEFW","description":"\u003cp\u003eLes roues à filtres électroniques iOptron iEFW permettent à une caméra mono de passer d'un filtre LRGB ou en bande étroite à l'autre sous contrôle logiciel pendant une session d'imagerie. Les deux modèles acceptent des filtres 1.25\" ou 31mm.\u003c\/p\u003e\u003cp\u003eL'iEFW-15 compte cinq positions, assez pour un jeu LRGB et un filtre en bande étroite, tandis que l'iEFW-18 en compte huit pour un jeu LRGB complet avec Ha, OIII et SII et une position libre.\u003c\/p\u003e","products":[{"product_id":"ioptron-3381","title":"iOptron iEFW-15 5-Position Electronic Filter Wheel for 1.25'' or 31mm Filters","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAutomates filter changes for astrophotography\u003c\/li\u003e\n\u003cli\u003e5-position carousel\u003c\/li\u003e\n\u003cli\u003eAccepts both 1.25\" mounted filters\u003c\/li\u003e\n\u003cli\u003eAccepts 31mm unmounted filters\u003c\/li\u003e\n\u003cli\u003eEnables unattended LRGB and narrowband imaging sequences\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-15 5-Position Electronic Filter Wheel for 1.25'' or 31mm Filters\u003c\/h2\u003e\n\u003cp\u003eThe iOptron iEFW-15 is an electronic filter wheel designed to automate one of the most critical steps in deep-sky imaging. Its internal 5-position carousel allows you to remotely switch between different filters without physically touching your telescope, preserving focus and alignment. The wheel offers flexible compatibility, accepting both standard 1.25\" mounted filters and 31mm unmounted glass filters for more demanding applications.\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 Imaging with 5 Filter Positions\u003c\/h3\u003e\n\u003cp\u003eThe core function of the iEFW-15 is to enable unattended, multi-filter imaging sessions. With 5 available slots, you can load a full LRGB (Luminance, Red, Green, Blue) set plus a specialized narrowband filter like H-alpha, or a complete SHO narrowband pallet (Sulfur-II, Hydrogen-alpha, Oxygen-III) with room to spare. This eliminates the need to manually swap filters for each channel, which is a primary source of imaging errors, especially on cold nights.\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\u003eFlexible Support for 1.25\" and 31mm Formats\u003c\/h3\u003e\n\u003cp\u003eThe iEFW-15 accommodates the two most common filter formats for small-to-medium sensor cameras. You can use standard 1.25\" threaded filters, which are widely available and cost-effective. For imagers using faster telescopes (f\/5 or lower) or larger sensors, the wheel also supports 31mm unmounted filters, which provide a larger clear aperture to help minimize vignetting at the edge of the field.\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 is the main benefit of using the iEFW-15 filter wheel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit of the \u003cstrong\u003eiEFW-15\u003c\/strong\u003e is automation. It allows your imaging software to automatically switch between filters during an imaging sequence (e.g., LRGB or narrowband). This means you can run a complete multi-hour, multi-channel imaging plan without manual intervention, which is crucial for efficiency and for preventing disturbances to your optical train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow many filters can the iEFW-15 hold?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe iEFW-15 features a \u003cstrong\u003e5-position\u003c\/strong\u003e carousel. This is sufficient for a standard LRGB filter set with one extra slot for a narrowband filter like H-alpha, or a full SHO narrowband set (SII, Ha, OIII) with two empty slots.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use my existing 1.25\" filters with the iEFW-15?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The iEFW-15 is designed to be compatible with standard \u003cstrong\u003e1.25\" mounted filters\u003c\/strong\u003e. You can thread your existing filters directly into the carousel positions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy would I choose 31mm unmounted filters over 1.25\" filters for the iEFW-15?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile 1.25\" filters are convenient, their mounting cell can sometimes cause vignetting (darkening of the corners) on cameras with larger sensors or in fast optical systems (f\/5 and below). \u003cstrong\u003e31mm unmounted filters\u003c\/strong\u003e offer a larger clear aperture, which helps ensure the entire sensor is evenly illuminated, making them a better choice for high-end imaging setups.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat imaging sequences can I run with the iEFW-15's 5 positions?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 5 positions on the iEFW-15 are ideal for several common imaging workflows:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLRGB + H-alpha:\u003c\/strong\u003e Capture detailed luminance data, standard color with RGB, and add deep red emission detail from nebulae with an H-alpha filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSHO Narrowband:\u003c\/strong\u003e Load Sulfur-II, H-alpha, and Oxygen-III filters to create Hubble-palette images of emission nebulae, even from light-polluted skies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhotometry:\u003c\/strong\u003e Load specialized photometric filters (B, V, R) for scientific measurements of variable stars.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the iEFW-15 useful for imaging the Andromeda Galaxy (M31) with an 80mm refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. For a broadband target like the Andromeda Galaxy (M31), you would load the iEFW-15 with LRGB filters. You can program your software to capture a long sequence of luminance frames for detail, followed by shorter sequences for each of the R, G, and B filters for color, all in a single automated session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/ioptron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eiOptron 2-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"iOptron","offers":[{"title":"Default Title","offer_id":52917291057437,"sku":"IOP-3381","price":279.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/iOptron-iEFW-15-5-Position-Electronic-Filter-Wheel-for-1-25-or-31mm-Filters-1_54f1e3a0-ec19-47e3-a377-462a052e6583.jpg?v=1789142034"},{"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":405.0,"currency_code":"CAD","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\/fr-us\/collections\/ioptron-iefw-electronic-filter-wheels.oembed","provider":"David Astro","version":"1.0","type":"link"}