{"title":"Baader Barlow Lenses","description":"\u003cp\u003eBaader Planetarium Barlow lenses and focal extenders raise magnification for planetary, lunar and double star work. The Carl Zeiss 2x Abbe Barlow with ClickLock, the 2.25x Q-Barlow and the 2x VIP Modular Barlow cover visual use in 1.25\" format.\u003c\/p\u003e\u003cp\u003eFor imaging, the Fluorite Flatfield Converter (FFC) offers 3x to 4x magnification with T-2 cameras, and the TZ-2, TZ-3 and TZ-4 telecentric systems produce a parallel light cone suited to solar filters.\u003c\/p\u003e","products":[{"product_id":"baader-2-25x-q-barlow-1-25","title":"Baader 2.25x Q-Barlow - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eProvides 2.25x magnification in its standard 1.25\" housing\u003c\/li\u003e\n\u003cli\u003eLens element unscrews for ~1.3x magnification when threaded directly into an eyepiece\u003c\/li\u003e\n\u003cli\u003eFeatures M28.5 filter threads for direct connection to eyepieces and camera nosepieces\u003c\/li\u003e\n\u003cli\u003eDelivers a 25mm vignetting-free image circle at 2.25x magnification\u003c\/li\u003e\n\u003cli\u003eHT-multicoated optics made from exotic glasses for maximum contrast\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\u003eDownloads\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\u003eBaader 2.25x Q-Barlow - 1.25\"\u003c\/h2\u003e\n\u003cp\u003eThe Baader 2.25x Q-Barlow offers a unique dual-magnification design in a compact 1.25\" format, providing a 2.25x factor in its housing and a lower ~1.3x factor when the lens element is threaded directly into an eyepiece via its M28.5 threads. Its HT-multicoated optics deliver a sharp, 25mm illuminated field perfect for planetary cameras, providing a magnification step that avoids duplication with common eyepiece sets.\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\u003eDual-Mode Magnification: A 2.25x Barlow with a 1.3x Direct-Thread Option\u003c\/h3\u003e\n\u003cp\u003eThe core of the Q-Barlow's design is its two-part construction. Used as a complete unit, it functions as a high-quality 2.25x Barlow lens. However, the optical element itself can be unscrewed from the 1.25\" barrel and threaded directly into any eyepiece or camera nosepiece with a standard M28.5 (1.25\") filter thread.\u003c\/p\u003e\n\u003cp\u003eThis direct-thread configuration reduces the distance between the Barlow lens and the focal plane, lowering the magnification to approximately 1.3x. This gives you two distinct magnification factors from a single accessory, ideal for fine-tuning your image scale for planetary imaging or visual use without swapping hardware.\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\u003eHT-Multicoated Optics: A 25mm Image Circle for Planetary Cameras\u003c\/h3\u003e\n\u003cp\u003eConstructed from exotic glasses with Baader's Phantom Group Coating, the Q-Barlow is engineered for high-contrast, high-resolution views. In its primary 2.25x configuration, it provides a fully illuminated, vignetting-free image circle of 25mm, more than enough to cover the sensors of popular planetary and guide cameras.\u003c\/p\u003e\n\u003cp\u003eWhen used in the 1.3x direct-thread mode, the illuminated circle is 13mm, which remains well-suited for smaller-chip planetary cameras. This optical precision ensures that you are capturing the finest possible detail on Jupiter's cloud bands or the Cassini Division in Saturn's rings.\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\u003eBeyond 2x: The Advantage of a 2.25x Magnification Factor\u003c\/h3\u003e\n\u003cp\u003eThe specific 2.25x magnification was chosen to integrate seamlessly with eyepiece sets like the Baader Q-Turret, providing useful magnification steps without creating redundant focal lengths that a standard 2x Barlow might. For imagers, this slight increase over 2x can be critical for achieving the optimal image scale (arc-seconds per pixel) needed to fully resolve planetary detail with a given telescope and camera combination.\u003c\/p\u003e\n\u003cp\u003eThis makes the Q-Barlow a more strategic choice than a generic 2x Barlow. It allows you to precisely match your camera's sensor resolution to your telescope's focal length, ensuring you capture all the detail your optics can deliver without being over or under-sampled.\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\"\u003eHow do I get the 1.3x magnification from the Baader Q-Barlow?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo achieve the lower magnification, you simply unscrew the black lens cell from the bottom of the silver 1.25\" barrel. This lens cell has a male \u003cstrong\u003eM28.5 thread\u003c\/strong\u003e, which is the standard for 1.25\" filters. You can then thread it directly into the barrel of an eyepiece or a camera's 1.25\" nosepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main advantage of the Baader Q-Barlow's 2.25x magnification for planetary imaging on an SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOn a long focal-ratio telescope like a Schmidt-Cassegrain, the 2.25x factor often provides the ideal image scale for modern planetary cameras with small pixels. A standard 2x Barlow might leave the image slightly under-sampled, while a 3x can be too much magnification for average seeing conditions. The 2.25x factor hits a sweet spot, allowing you to capture maximum detail on planets like Jupiter and Saturn.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Baader 2.25x Q-Barlow vignette with my wide-field 1.25\" eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn its 2.25x configuration, the Q-Barlow provides a generous \u003cstrong\u003e25mm illuminated field\u003c\/strong\u003e, which is large enough to avoid vignetting with most 1.25\" eyepieces, including Plössls and Orthoscopics. In the 1.3x direct-thread mode, the illuminated field is smaller at 13mm, which may cause some vignetting on very long focal length or wide-field 1.25\" eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader Q-Barlow for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. While it is optimized for imaging, the high-quality, HT-multicoated optics make it an excellent visual Barlow. The dual-magnification feature is particularly useful for visual observers, effectively doubling the number of magnifications available from your eyepiece collection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy was the Baader 2.25x Q-Barlow designed for the Q-Turret eyepiece set?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 2.25x magnification factor was specifically calculated to complement the focal lengths of the Baader Classic Ortho\/Plössl eyepieces included in the Q-Turret set. Using a standard 2x Barlow would result in magnifications that are too close to the next eyepiece in the series. The 2.25x factor creates a more evenly spaced and useful set of magnifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"HT-multicoated\" mean for the Baader Q-Barlow?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eHT stands for \"High Transmission.\" The Baader 2.25x Q-Barlow uses Baader's Phantom Group Coating on all air-to-glass surfaces. This advanced multi-layer coating process maximizes light throughput and minimizes reflections, resulting in brighter images with higher contrast, which is crucial for discerning subtle details on planetary surfaces.\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\u003eMagnification (Standard)\u003c\/td\u003e\n\u003ctd\u003e2.25x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification (Direct-Thread)\u003c\/td\u003e\n\u003ctd\u003e~1.3x (varies with distance)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Element Thread\u003c\/td\u003e\n\u003ctd\u003eM28.5 Male (Standard 1.25\" Filter Thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Thread\u003c\/td\u003e\n\u003ctd\u003eM28.5 Female\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIlluminated Field (@ 2.25x)\u003c\/td\u003e\n\u003ctd\u003e25 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIlluminated Field (@ 1.3x)\u003c\/td\u003e\n\u003ctd\u003e13 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eHT-Multicoated (Phantom Group Coating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eBarlow Lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.07\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-Coating\u003c\/td\u003e\n\u003ctd\u003eHigh transmission multi-coated (HT-MC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClamping System\u003c\/td\u003e\n\u003ctd\u003eScrew clamps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eø 1¼\" (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eø 1¼\" (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader 2.25x Q-Barlow - 1.25\"\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDust Caps\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967316521245,"sku":"BAA-2956185","price":81.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader-2-25x-Q-Barlow-1-25-inch-1__12146.1597110675.1280.1280.jpg?v=1684340466"},{"product_id":"baader-hyperion-zoom-2-25x-barlow","title":"Baader Hyperion Zoom 2.25X Barlow","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e2.25x Primary Magnification Factor\u003c\/li\u003e\n\u003cli\u003eModular Design with 1.3x Low-Power Configuration\u003c\/li\u003e\n\u003cli\u003eIntegrated T-2 Thread for Direct Camera Connection\u003c\/li\u003e\n\u003cli\u003eVariable 2.3x to 2.7x Magnification for Imaging\u003c\/li\u003e\n\u003cli\u003eAttaches via Standard 1.25\" Eyepiece Filter Threads\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\u003eDownloads\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\u003eBaader Hyperion Zoom 2.25X Barlow\u003c\/h2\u003e\n\u003cp\u003eThe Baader Hyperion Zoom 2.25X Barlow delivers a primary 2.25x magnification factor, specifically designed to complement the Hyperion Zoom eyepiece but compatible with nearly any 1.25\" eyepiece. Its modular design allows the optical element to be unthreaded for a gentle 1.3x magnification boost, or attached directly to a camera via the T-2 adapter for factors ranging from 2.3x to 2.7x depending on the working distance.\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\u003eA 2.25x Barlow Optimized for the Hyperion Zoom Eyepiece\u003c\/h3\u003e\n\u003cp\u003eIn its standard configuration, this accessory functions as a high-quality 2.25x Barlow lens. It inserts into a 1.25\" focuser or diagonal and accepts a 1.25\" eyepiece, instantly multiplying its magnification. While it is optically matched to the Baader Hyperion Zoom, its excellent optical quality enhances the view through any standard eyepiece, increasing power for detailed views of planetary surfaces and tight double stars.\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\u003eModular Design: From 1.3x to 2.7x Magnification\u003c\/h3\u003e\n\u003cp\u003eThe Hyperion Zoom Barlow's versatility comes from its multi-part construction. You can unscrew the 13 mm long optical element from the Barlow body and thread it directly into any eyepiece or accessory that has a standard 1.25\" filter thread. This configuration provides a lower, approximate 1.3x magnification factor, perfect for a slight power increase without significantly dimming the image.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Barlow Mode:\u003c\/strong\u003e Provides a fixed 2.25x magnification for visual use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Power Mode:\u003c\/strong\u003e The lens element alone threads into an eyepiece for an approximate 1.3x boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImaging Mode:\u003c\/strong\u003e Using the included T-2 adapter, magnification varies from ~2.3x to ~2.7x based on camera distance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eT-2 Threading for Planetary Cameras at 25mm to 55mm\u003c\/h3\u003e\n\u003cp\u003eFor astrophotographers, the Hyperion Zoom Barlow includes a T-2 adapter, allowing a direct, secure connection to planetary cameras and DSLRs. This setup is ideal for adapting a modern, small-pixel camera to a long focal length telescope to achieve optimal image scale. The final magnification is dependent on the distance from the Barlow lens to the sensor, providing ~2.3x at a 25mm working distance and ~2.7x at a 55mm distance, giving you fine control over your imaging train.\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\u003eHyperion Zoom Barlow vs. Baader's Zeiss \u0026amp; FFC Barlows\u003c\/h3\u003e\n\u003cp\u003eBaader offers several world-class Barlow lenses, each serving a different purpose. The Hyperion Zoom Barlow is the versatile, high-value option for visual observers and planetary imagers who need flexibility in the lower magnification range.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Baader Zeiss Abbe Barlow:\u003c\/strong\u003e The Zeiss Barlow is a legendary performer in the 2x to 3x range, known for its ultimate sharpness. The Hyperion Zoom Barlow offers greater modularity and multiple magnification factors at a more accessible price point.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Baader FFC (Fluorite Flatfield Converter):\u003c\/strong\u003e The FFC is an uncompromising, professional-grade system for extreme magnifications and large-format sensors. The Hyperion Zoom Barlow is the superior choice when a smaller image circle is sufficient and more moderate magnification is desired.\u003c\/li\u003e\n\u003c\/ul\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 primary purpose of the Baader Hyperion Zoom 2.25X Barlow?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts main purpose is to act as a high-quality \u003cstrong\u003e2.25x Barlow lens\u003c\/strong\u003e, specifically matched to the optical design of the Baader Hyperion Mark IV Zoom eyepiece. However, its modularity makes it a versatile magnification tool for a wide range of eyepieces and cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I achieve the 1.3x magnification with the Hyperion Zoom Barlow?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo get the approximate \u003cstrong\u003e1.3x magnification\u003c\/strong\u003e, you unscrew the lower black optical cell (the lens element) from the silver Barlow tube. You can then thread this cell directly into the 1.25\" filter threads on the barrel of most eyepieces or camera nosepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader Hyperion Zoom 2.25X Barlow with a camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Barlow includes a \u003cstrong\u003eT-2 adapter\u003c\/strong\u003e for a secure, threaded connection to most planetary cameras or a DSLR with the appropriate T-ring. This method provides a variable magnification of approximately \u003cstrong\u003e2.3x to 2.7x\u003c\/strong\u003e, depending on the spacing to the camera sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Hyperion Zoom Barlow work with eyepieces other than the Baader Hyperion Zoom?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. While it is optically optimized for the Hyperion Zoom, it functions as an excellent, high-quality Barlow lens with virtually any standard \u003cstrong\u003e1.25\" eyepiece\u003c\/strong\u003e from any manufacturer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the Hyperion Zoom Barlow help image Saturn with my 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn 8\" SCT has a long focal length, but modern planetary cameras have very small pixels. To avoid undersampling and capture fine detail in Saturn's rings, you need more magnification. Using the Hyperion Zoom Barlow with its \u003cstrong\u003eT-2 adapter\u003c\/strong\u003e increases the telescope's effective focal length by about \u003cstrong\u003e2.5x\u003c\/strong\u003e, enlarging the planet on the sensor and better matching the telescope's resolution to your camera's pixel size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy telescope has a long focal length. Is the 1.3x mode on the Hyperion Zoom Barlow useful?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the \u003cstrong\u003e1.3x configuration\u003c\/strong\u003e is perfect for when you need just a small increase in power. On a long focal length scope aimed at a globular cluster like M13 (Hercules Cluster), the 2.25x factor might make the view too dim or too narrow. The 1.3x mode provides a gentle boost to better resolve stars in the core without sacrificing as much brightness or field of view.\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\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification (x)\u003c\/td\u003e\n\u003ctd\u003e2.25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-Coating\u003c\/td\u003e\n\u003ctd\u003ePhantom Coating® Group\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size (in)\u003c\/td\u003e\n\u003ctd\u003e1¼\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eBarlow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeciality\u003c\/td\u003e\n\u003ctd\u003eBarlow lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eM28.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eM28.5, M42 x 0.75 (T-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eM28.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eø 1¼\" (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\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\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Hyperion_Universal_Zoom_Mark_IV_Technical_Data.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Hyperion Universal Zoom Mark IV Technical Data\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Hyperion_Zoom_Mark_III_Technical_Data.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Hyperion Zoom Mark III Technical Data\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967317111069,"sku":"BAA-2956180","price":194.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader-Hyperion-Zoom-2-25X-Barlow-1__36871.1597110690.1280.1280.jpg?v=1684340489"},{"product_id":"baader-2x-vip-modular-barlow-1-25","title":"Baader 2x VIP Modular Barlow - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eModular 2x Barlow Design\u003c\/li\u003e\n\u003cli\u003e1.25\" Barrel and Filter Thread Compatibility\u003c\/li\u003e\n\u003cli\u003eIntegrated T-2 Threads for Imaging\u003c\/li\u003e\n\u003cli\u003eDesigned for Full-Frame Sensor Illumination\u003c\/li\u003e\n\u003cli\u003eMulti-Coated (MC) Optical Element\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\u003eDownloads\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\u003eBaader 2x VIP Modular Barlow - 1.25\"\u003c\/h2\u003e\n\u003cp\u003eThe Baader 2x VIP Modular Barlow - 1.25\" delivers exceptional optical quality and a modular design that goes far beyond a standard 2x amplification factor. Its Visually and Photographically (VIP) optimized system is built around a T-2 thread interface, offering multiple configurations for both 1.25\" eyepieces and direct camera attachment.\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\u003eHigh-Fidelity 2x Amplification in a 1.25\" Format\u003c\/h3\u003e\n\u003cp\u003eAt its core, the VIP Barlow provides a high-contrast, sharp 2x magnification for any 1.25\" eyepiece. The multi-coated optics are engineered to a standard reminiscent of legendary Zeiss designs, ensuring minimal light scatter and maximum throughput for observing subtle planetary details or splitting tight double stars. Unlike many barlows, the VIP is designed to fully illuminate a full-frame sensor, making it a powerful tool for imagers using larger format cameras.\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\u003eA Modular T-2 System Beyond a Fixed 2x Factor\u003c\/h3\u003e\n\u003cp\u003eThe true strength of the VIP Barlow lies in its modularity. The main optical element can be unscrewed from the 1.25\" nosepiece and used in multiple configurations to achieve a range of magnification factors. By threading the element directly into an eyepiece with a 1.25\" filter thread, you can achieve a lower power increase, ideal for fine-tuning image scale with planetary cameras on long focal length scopes.\u003c\/p\u003e\n\u003cp\u003eFor higher magnifications, the system's T-2 threads allow you to insert T-2 extension tubes between the optical element and the eyepiece holder or camera. This flexibility allows you to precisely dial in the optimal magnification for prevailing seeing conditions, replacing the need for multiple fixed-power barlows.\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\u003eDirect T-2 Camera Connection for Planetary Imaging\u003c\/h3\u003e\n\u003cp\u003eFor astrophotographers, the integrated T-2 male thread is a critical feature. It allows you to connect a DSLR or dedicated astronomy camera directly to the barlow's optical element, creating a solid, threaded connection that eliminates the sag and tilt common with simple set-screw holders. This secure optical train is essential for maintaining sharp focus and collimation during an imaging 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\u003eBaader VIP Barlow vs. Standard 2x Barlows: Why Modularity Matters\u003c\/h3\u003e\n\u003cp\u003eA standard barlow lens offers one function: a fixed magnification increase. While simple, this approach lacks the flexibility needed for modern astronomy, where observers frequently switch between different eyepieces and cameras.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed Barlow Advantage:\u003c\/strong\u003e A non-modular barlow is simple to use, with no extra parts to manage in the dark.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaader VIP Barlow Advantage:\u003c\/strong\u003e The VIP Barlow acts as an optical toolkit. It allows you to adjust magnification by adding or removing components, thread the lens cell directly into accessories like the Baader Hyperion Zoom for optimized amplification, and create rigid, secure connections for imaging that a basic barlow cannot match.\u003c\/li\u003e\n\u003c\/ul\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 makes the Baader 2x VIP Barlow \"modular\"?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader 2x VIP Barlow is \"modular\" because its main optical lens cell can be unscrewed and reconfigured. You can thread it directly into 1.25\" eyepieces, add T-2 extension tubes to vary the magnification, or connect it directly to a camera's T-ring. This allows it to function as multiple accessories in one.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I connect a camera to the Baader 2x VIP Barlow?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe VIP Barlow features an integrated \u003cstrong\u003eT-2 male thread\u003c\/strong\u003e. You can connect your DSLR or astronomy camera by using a camera-specific T-ring, which threads directly onto the barlow. This creates a secure, rigid connection ideal for astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader VIP Barlow to get less than 2x magnification?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. By unscrewing the optical element from the main body and threading it directly into the 1.25\" filter threads of an eyepiece or camera nosepiece, you create a configuration with a lower magnification factor. This is particularly useful for making small adjustments to image scale with planetary cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Baader 2x VIP Barlow a good match for a Hyperion Zoom eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it was specifically designed with the Baader Hyperion Mark IV Zoom in mind. The barlow's optical element can be threaded directly onto the zoom eyepiece, providing a nominal magnification increase and maintaining the excellent optical quality of the Hyperion design.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm imaging Jupiter with an 8\" SCT and a planetary camera. How does the Baader 2x VIP Barlow help me get the right image scale?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn 8\" SCT has a long native focal length. The Baader 2x VIP Barlow allows you to fine-tune your final focal ratio. You can use it in its standard 2x configuration or add T-2 extensions to increase magnification on nights of excellent seeing. Conversely, you can thread just the lens element into your camera's 1.25\" nosepiece for a smaller magnification boost, helping you perfectly match the planet's size to your camera's sensor pixels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the Baader 2x VIP Barlow illuminate the full sensor of my full-frame DSLR for lunar imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the Baader 2x VIP Barlow is optically designed to illuminate a full-frame sensor without significant vignetting (darkening at the corners). This makes it an excellent choice for capturing high-resolution mosaics of the Moon or wide-field planetary conjunctions with a full-frame camera.\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\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-Coating\u003c\/td\u003e\n\u003ctd\u003eMulti-Coated (MC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClamping System\u003c\/td\u003e\n\u003ctd\u003eScrew clamps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size (in)\u003c\/td\u003e\n\u003ctd\u003e1¼\", 2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eBarlow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeciality\u003c\/td\u003e\n\u003ctd\u003eBarlow lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Diameter \/ Clear Aperture (mm)\u003c\/td\u003e\n\u003ctd\u003e28 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal length reduction\u003c\/td\u003e\n\u003ctd\u003e-65.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eø 1¼\" (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eM28, M42 x 0.75 (T-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eø 1¼\" (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\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\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_VIP_Barlow_Magnification_Guide_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium VIP Barlow Magnification Guide Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967324713245,"sku":"BAA-2406101","price":332.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-2x-VIP-Modular-Barlow-1-25-inch-1__19249.1597110761.1280.1280.jpg?v=1684340609"},{"product_id":"baader-carl-zeiss-2x-abbe-barlow-lens-1-25-w-clicklock","title":"Baader Carl Zeiss 2x Abbe Barlow Lens - 1.25\" w\/ ClickLock","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e2x Nominal Magnification Factor\u003c\/li\u003e\n\u003cli\u003eLegendary Carl Zeiss Abbe Optical Design\u003c\/li\u003e\n\u003cli\u003eMulti-Layer Coatings with 0.2% Reflection Loss\u003c\/li\u003e\n\u003cli\u003e1.25\" Baader ClickLock Eyepiece Clamp\u003c\/li\u003e\n\u003cli\u003eIntegrated T-2 Photographic Thread\u003c\/li\u003e\n\u003cli\u003eCalculated for 35mm Full-Frame Image Circle\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\u003eDownloads\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\u003eBaader Carl Zeiss 2x Abbe Barlow Lens - 1.25\" w\/ ClickLock\u003c\/h2\u003e\n\u003cp\u003eThe Baader Carl Zeiss 2x Abbe Barlow delivers uncompromising optical fidelity, pairing a legendary German-made Zeiss lens system with a versatile T-2 thread and a 1.25\" ClickLock clamp. Its advanced multi-layer coatings achieve a remarkable 0.2% reflection loss within the peak spectral range of the dark-adapted human eye, ensuring maximum contrast for the most demanding visual and photographic applications. This Barlow is calculated for a 35mm image diagonal, making it a premium choice for full-frame planetary imaging.\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\u003eLegendary Zeiss Abbe Optics with 0.2% Reflectivity Coatings\u003c\/h3\u003e\n\u003cp\u003eAt the heart of this Barlow is an authentic Carl Zeiss Abbe lens element, manufactured in Jena, Germany, to a standard that few optics can match. Zeiss developed a proprietary multi-layer anti-reflection coating specifically for this Barlow, achieving a measured 0.2% light loss. This extreme efficiency translates to near-zero coating scatter, preserving the finest, low-contrast details on planetary surfaces and ensuring the highest possible image contrast.\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\u003eModular T-2 System with a 1.25\" ClickLock Clamp\u003c\/h3\u003e\n\u003cp\u003eEngineered for versatility, the Zeiss Abbe Barlow consists of two primary components. The front barlow section terminates in a standard T-2 male thread, allowing you to connect it directly to a DSLR T-ring for imaging. The rear section is the acclaimed Baader 1.25\" ClickLock eyepiece clamp, which provides a secure, self-centering grip on eyepieces and accessories with a simple twist, eliminating thumbscrew-induced wobble. By adding optional T-2 extension tubes between these components, you can increase the magnification factor from the nominal 2x up to approximately 3x.\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\u003eZeiss Abbe Barlow vs. Baader Fluorite FFC: The Right Tool for the Job\u003c\/h3\u003e\n\u003cp\u003eBaader offers multiple high-end magnification systems, and choosing the correct one depends on your application. The Carl Zeiss Abbe Barlow is the qualitatively equivalent solution to the Baader Fluorite Flatfield Converter (FFC) when your priority is the highest possible contrast over a smaller field of view.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarl Zeiss Abbe 2x Barlow:\u003c\/strong\u003e Optimized for critical lunar and planetary observation and imaging where maximum contrast and sharpness at the center of the field are paramount. It is the ideal choice for magnifying the image for smaller sensor planetary cameras or visual use with premium eyepieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaader Fluorite FFC:\u003c\/strong\u003e Designed for larger image circles and variable magnification over a much wider range. The FFC is the preferred tool for large-format sensors and when a perfectly flat field is required for wide-field, high-resolution imaging.\u003c\/li\u003e\n\u003c\/ul\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 makes the Baader Carl Zeiss 2x Abbe Barlow different from other 2x barlows?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe key differences are its optical heritage and advanced coatings. The \u003cstrong\u003eCarl Zeiss Abbe lens element\u003c\/strong\u003e is made in Jena, Germany, to legendary standards of quality. Its multi-layer coatings reduce reflections to just \u003cstrong\u003e0.2%\u003c\/strong\u003e, providing a level of contrast and light throughput that standard barlows cannot match.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the Zeiss Abbe Barlow for astrophotography with my DSLR?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou can achieve a direct, rigid connection. Simply unscrew the 1.25\" ClickLock clamp from the barlow lens element. This exposes a male \u003cstrong\u003eT-2 thread\u003c\/strong\u003e, which you can then connect directly to your camera-specific T-ring for prime-focus, magnified imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I achieve more than 2x magnification with this Zeiss Abbe Barlow?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The magnification factor increases as you add distance between the barlow lens and the eyepiece or camera sensor. By inserting optional \u003cstrong\u003eT-2 extension tubes\u003c\/strong\u003e between the lens element and the ClickLock clamp (or your camera), you can increase the magnification up to approximately \u003cstrong\u003e3x\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the 0.2% reflectivity coatings on a target like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOn a target like Jupiter, the difference is significant. The near-zero light scatter from the \u003cstrong\u003e0.2% reflectivity coatings\u003c\/strong\u003e prevents faint, subtle details from being washed out by stray light. This allows you to resolve finer, low-contrast features within Jupiter's cloud bands, see more detail in the Great Red Spot (GRS), and discern smaller festoons and swirls that would be lost in a lesser barlow.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Zeiss Abbe Barlow a good match for a high-end eyepiece in my 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt is an ideal match. An 8\" SCT has excellent resolving power, and a high-end eyepiece is designed to transmit that detail perfectly. The \u003cstrong\u003eCarl Zeiss Abbe Barlow\u003c\/strong\u003e is one of the few barlows on the market with optical quality high enough to not degrade that view. It will double the magnification without introducing chromatic aberration or reducing contrast, ensuring you see everything your telescope and eyepiece are capable of delivering on planetary targets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is a Baader ClickLock clamp?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader ClickLock is a premium eyepiece holder that replaces traditional thumbscrews. A gentle twist of the outer ring activates a three-point clamping system that holds your 1.25\" eyepiece or accessory perfectly centered and extremely secure. It prevents the tilting and marring of barrels often caused by thumbscrews.\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\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification (x)\u003c\/td\u003e\n\u003ctd\u003e2x - 3x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClamping System\u003c\/td\u003e\n\u003ctd\u003eClickLock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size (in)\u003c\/td\u003e\n\u003ctd\u003e1¼\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eBarlow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeciality\u003c\/td\u003e\n\u003ctd\u003eBarlow lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eø 1¼\" (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eø 1¼\" (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\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\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Zeiss_2x_Abbe_Barlow_Transmission_Curve.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Zeiss 2x Abbe Barlow Transmission Curve\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967326384413,"sku":"BAA-1603321","price":695.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"baader-fluorite-flatfield-converter","title":"Baader Fluorite Flatfield Converter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eGenuine Calcium Fluorite (CaF2) Two-Element Cemented Design\u003c\/li\u003e\n\u003cli\u003eCorrects for Field Curvature to Produce a Flat Imaging Plane\u003c\/li\u003e\n\u003cli\u003eVariable Magnification Factor Achieved by Adjusting Spacing\u003c\/li\u003e\n\u003cli\u003eStandard T-2 Thread and 2\" Barrel for Universal Connection\u003c\/li\u003e\n\u003cli\u003eEngineered for Large Image Circles Suitable for Medium-Format Sensors\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\u003eDownloads\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\u003eBaader Fluorite Flatfield Converter\u003c\/h2\u003e\n\u003cp\u003eThe Baader Fluorite Flatfield Converter (FFC) is an optical amplifier engineered not merely to magnify, but to deliver an uncompromisingly sharp, flat field across a massive image circle. Conceived as the ultimate barlow-type lens, its two-element cemented design utilizes genuine Calcium Fluorite (CaF2) to achieve a level of resolution and field correction that remains unsurpassed, making it a critical component for high-resolution planetary imaging with modern, small-pixel cameras.\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\u003eA True Fluorite Flatfield Converter: Beyond the Barlow\u003c\/h3\u003e\n\u003cp\u003eUnlike a conventional barlow lens which primarily increases magnification, the FFC was designed from the ground up to also eliminate field curvature. This makes it a true \"converter,\" reshaping the optical output of your telescope to produce a perfectly flat focal plane. This is achieved through a sophisticated optical design that required extreme glass types, culminating in the use of genuine CaF2.\u003c\/p\u003e\n\u003cp\u003eThe use of Fluorite provides an unparalleled level of sharpness across a very broad spectral range, delivering apochromatic amplification. The result is an optical system with a line resolution far exceeding even legendary eyepiece designs, ensuring the only limit to image sharpness is the main optic of your telescope.\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\u003eUncompromised Sharpness Across a Large, Flat Field\u003c\/h3\u003e\n\u003cp\u003eOriginally designed for the Zeiss APQ apochromats and medium-format film cameras, the FFC produces a fully illuminated and corrected image circle large enough for today's largest CMOS sensors. Even on fast telescopes, the FFC delivers significantly better on-axis sharpness than a classic barlow, which is the deciding factor in planetary and lunar photography.\u003c\/p\u003e\n\u003cp\u003eFor the dedicated planetary imager, this means you can exploit the full resolving power of your telescope. The enhanced contrast and resolution allow you to capture finer details in Jupiter's cloud bands or subtle features within the Cassini Division of Saturn's rings, pushing the performance of even relatively small, high-quality telescopes to their absolute limit.\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\u003eVariable Magnification and Universal T-2 Integration\u003c\/h3\u003e\n\u003cp\u003eThe FFC offers exceptional flexibility by allowing you to vary the magnification factor simply by changing the distance between the converter and the camera sensor. This allows you to precisely tailor the image scale to match seeing conditions and the target object, from moderate amplification for full-disc lunar shots to extreme magnification for detailed planetary work. The optimal line resolution is achieved at its native design distance, but on-axis sharpness remains diffraction-limited by your telescope even at very high magnifications.\u003c\/p\u003e\n\u003cp\u003eIntegration into any imaging train is straightforward. The Baader FFC features a standard T-2 (M42x0.75) thread on the camera side and its main body fits into any 2\" focuser or eyepiece clamp. This ensures compatibility with a vast ecosystem of adapters, extension tubes, and off-axis guiders via the Baader Astro T-2 and M68 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\u003eCritical Thermal Management for CaF2 Optics\u003c\/h3\u003e\n\u003cp\u003eThe extraordinary optical properties of Calcium Fluorite come with a significant trade-off: extreme sensitivity to thermal shock. Sudden temperature changes can induce stress in the crystal, potentially causing permanent damage. To preserve this high-end optical system, meticulous care is mandatory.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAcclimatization is Essential:\u003c\/strong\u003e Never move the FFC from a warm indoor environment directly into cold night air, or vice-versa. Allow it to cool down and warm up gradually inside an insulated case for at least an hour.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolar Observing is Forbidden:\u003c\/strong\u003e Do not use the FFC for solar photography. The focused heat can cause rapid, localized temperature changes that will destroy the fluorite elements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty Exclusion:\u003c\/strong\u003e Damage caused by thermal stress is detectable and is explicitly excluded from the warranty. This is not a grab-and-go accessory; it is a precision instrument that demands deliberate, careful handling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFFC vs. Other Baader Barlows: Choosing the Right Amplifier\u003c\/h3\u003e\n\u003cp\u003eBaader offers several barlows, each optimized for a different application. The FFC stands at the pinnacle for uncompromising, large-field imaging, but other options may be more suitable for different goals.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Zeiss Abbe Barlow:\u003c\/strong\u003e The Zeiss Abbe is the premier choice for the common visual magnification range. It offers legendary quality for visual observers who want a compact, high-contrast amplifier without the FFC's large-field correction or thermal sensitivity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. VIP Barlow:\u003c\/strong\u003e The VIP (Visual and Photographic) is a versatile workhorse calculated for full-frame (35mm) sensors. It's the ideal solution when you need excellent correction for standard camera formats without the cost and handling requirements of the FFC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Q-Turret Barlow:\u003c\/strong\u003e This inexpensive and high-quality barlow is designed for flexibility at lower magnifications. Its removable lens element can be threaded directly into eyepieces or camera noses, making it perfect for fine-tuning image scale on planetary cameras with long-focus telescopes.\u003c\/li\u003e\n\u003c\/ul\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 makes the Baader Fluorite Flatfield Converter different from a standard Barlow lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA standard Barlow lens is designed only to increase magnification, which often worsens existing field curvature. The \u003cstrong\u003eBaader FFC\u003c\/strong\u003e is a \"converter\" that both magnifies and corrects for field curvature, producing a sharp, flat imaging plane across a very large image circle, a feat made possible by its genuine Calcium Fluorite (CaF2) elements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I change the magnification with the Baader FFC?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou can vary the magnification of the \u003cstrong\u003eBaader FFC\u003c\/strong\u003e by adjusting the physical distance between the converter and your camera's sensor. Increasing the distance increases the magnification. This is typically done by adding T-2 extension tubes of various lengths into the imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy are there such strict temperature warnings for the Baader Fluorite Flatfield Converter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eBaader FFC\u003c\/strong\u003e uses lenses made from crystalline Calcium Fluorite (CaF2). While this material provides supreme optical correction, it is highly sensitive to thermal shock. A rapid change in temperature (e.g., moving it from a warm house to a cold outdoors) can cause internal stress that may permanently damage the lenses. Gradual acclimatization is mandatory for this instrument.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader FFC for visual observing as well as imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the \u003cstrong\u003eBaader Fluorite Flatfield Converter\u003c\/strong\u003e can be used visually with an appropriate eyepiece holder attached to its T-2 thread. Its optical excellence provides stunning visual views, although its design is primarily optimized for photographic applications where its large, flat field can be fully utilized by a camera sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI image Jupiter with a large SCT. How will the Baader FFC improve my results over a typical Barlow?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor imaging Jupiter with an SCT, the \u003cstrong\u003eBaader FFC\u003c\/strong\u003e offers a significant advantage in on-axis sharpness and contrast compared to typical Barlows. Its superior optical correction ensures that you are capturing the finest possible detail that your telescope can resolve, limited only by the seeing conditions, not the amplifier in your imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy full-frame camera shows field curvature with my refractor. Will the Baader Fluorite Flatfield Converter help?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The primary design goal of the \u003cstrong\u003eBaader Fluorite Flatfield Converter\u003c\/strong\u003e is to produce a flat imaging plane. If your refractor and camera combination suffers from field curvature, the FFC will actively correct for it while simultaneously increasing magnification, resulting in sharp stars from the center to the edge of your full-frame sensor.\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\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification (x)\u003c\/td\u003e\n\u003ctd\u003e3x - 8x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-Coating\u003c\/td\u003e\n\u003ctd\u003eHigh transmission multi-coated (HT-MC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eBarlow, Field Flattener\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeciality\u003c\/td\u003e\n\u003ctd\u003eBarlow lens, Field Flattener\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eø 2\" (50.8mm)\u003c\/td\u003e\n\u003c\/tr\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\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_FFC_System_Overview_with_Item_Numbers.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium FFC System Overview with Item Numbers\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_FFC_Product_Flyer.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium FFC Product Flyer\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_FFC_Standard_Combinations_for_4x_Extension.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium FFC Standard Combinations for 4x Extension\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_FFC_Focal_Distances_Drawing.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium FFC Focal Distances Drawing\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967374127389,"sku":"BAA-2458200","price":1063.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader-Fluorite-Flatfield-Conve-1__47463.1597111082.1280.1280.jpg?v=1684341618"},{"product_id":"baader-telecentric-system-tz-2-2x","title":"Baader Telecentric System TZ-2 - 2x","description":"\u003c!-- more --\u003e\u003cul\u003e\n\u003cli\u003eTelecentric with 2\" outer diameter and T-2 threads on both sides\u003c\/li\u003e\n\u003cli\u003eAplanatic, with 2x focal length extension to achieve a parallel f\/30 beam in conjunction with ~f\/7,5 optics systems – free of field curvature\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for H-alpha at 656,3 nm, delivering 99% Strehl (99% definition brightness)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBaader Telecentric Systems for focal length extension\u003c\/h3\u003e\u003ch4\u003efor supplying a parallel optical beam and for providing sufficient backfocus, in conjunction with any SolarSpectrum H-alpha filter\u003c\/h4\u003e\u003cp\u003eTelecentric optics sets are often confused with a barlow lens. Both can be used to increase the focal length. Telecentric assys are designed so that the exit pupil seemingly is positioned at infinity, which means that the center ray from any point in the field appears to come from infinity and is therefore perpendicular to the image plane and parallel to the optic axis. This means that the off axis beam does arrive at the image plane with the same angular geometry as the axial rays. All field elements look as if they where on axis, across the image plane and - unlike to a barlow lens - the edge field rays are not tipped bundles.\u003c\/p\u003e\u003cp\u003eBecause all the principal rays across the image plane are perpendicular to the image plane, the rays at the edge of the field will pass through an etalon just in front of the focal plane with exactly the same geometry as the rays on axis. So in an f\/30 telecentric optical arrangement, the etalon sees the exact same geometry clear across the field, and the spectral bandpass does not shift in wavelength across the entire field of view.\u003c\/p\u003e\u003cp\u003eStarting from an aperture ratio of ~f\/15 (+2x Telecentric), ~f\/10 (+3x Telecentric) or ~f\/7.5 (+4x Telecentric), the Baader TZ-systems will create a parallel beam with ~f\/30 aperture ratio. In the case of largely deviating telescope focal lengths, the clear objective aperture of the telescope should be reduced in diameter to the point that the final resulting f\/ratio is close to f\/30 again (we do offer a suitable iris-diaphragm for this purpose).\u003c\/p\u003e\u003cp\u003eTZ-system working distance to the camera sensor – when measured from their rear lens – range from 200mm for the TZ-2 to 230 mm for the TZ-4 - to 250 mm for the TZ-3. This provides enough room for the H-alpha filter housing and most any accessories, e.g. a Baader 2\" mirror diagonal or any conceivable camera device. All TZ-coatings are matched to the different lens glass-substrates and optimized for maximum throughput at 656 nm.\u003c\/p\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMANUFACTURER\u003c\/th\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU (#)\u003c\/th\u003e\n\u003ctd\u003e2459255\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEAN CODE\u003c\/th\u003e\n\u003ctd\u003e4047825008701\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWEIGHT (KG)\u003c\/th\u003e\n\u003ctd\u003e0.356\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFOCAL LENGTH EXTENSION\u003c\/th\u003e\n\u003ctd\u003e2-fach\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUSAGE\u003c\/th\u003e\n\u003ctd\u003efor H-alpha observation with SolarSpectrum Filters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eINNER CONNECTION (LENS SIDED)\u003c\/th\u003e\n\u003ctd\u003eThread, T-2 (M42 x 0,75)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOUTER CONNECTION (EYEPIECE\/-CAMERA-SIDED)\u003c\/th\u003e\n\u003ctd\u003eThread, T-2 (M42 x 0,75)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"moretab\" data-title=\"Downloads \u0026amp; Support\"\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_baader_telecentric_systems_tzs_for_h_solar_filters.pdf?v=1684341062?v=1590568855\" target=\"_blank\"\u003eBaader Telecentric Systems (TZS) for H-α solar filters\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_baader_m68_tele_compendium_telescope_connector_for_solarspectrum_baader_ffc_and_telecentric_systems.pdf?v=1684340407?v=1590568479\" target=\"_blank\"\u003eBaader M68 Tele-Compendium | Telescope-connector for SolarSpectrum, Baader FFC and telecentric systems\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967382155549,"sku":"BAA-2459255","price":657.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Telecentric-System-TZ-2-2x-1__36823.1597111120.1280.1280.jpg?v=1684341743"},{"product_id":"baader-telecentric-system-tz-3-3x-research-grade","title":"Baader Telecentric System TZ-3  - 3x Research Grade","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e3x Telecentric Focal Extender\u003c\/li\u003e\n\u003cli\u003eEngineered for Narrowband H-alpha Solar Filters\u003c\/li\u003e\n\u003cli\u003eProduces a Parallel (Collimated) Light Path\u003c\/li\u003e\n\u003cli\u003eMaintains Etalon Bandpass Across the Entire Field\u003c\/li\u003e\n\u003cli\u003eResearch Grade Optical Design\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\u003eDownloads\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\u003eBaader Telecentric System TZ-3 - 3x Research Grade\u003c\/h2\u003e\n\u003cp\u003eThe Baader Telecentric System TZ-3 is an essential optical component for high-resolution solar imaging, providing a 3x focal length amplification designed to create a perfectly parallel light path. This research-grade system is not a simple Barlow lens; it is an engineered solution to ensure that expensive, sub-angstrom H-alpha etalons deliver their full theoretical contrast and resolution across the entire imaging sensor.\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\u003eA 3x Focal Extender for Optimized Etalon Illumination\u003c\/h3\u003e\n\u003cp\u003eThe primary function of the TZ-3 is to convert your telescope's native focal ratio into the slow, collimated beam required by SolarSpectrum and other high-end H-alpha filters. By increasing the effective focal length by a factor of 3x, a telescope operating around f\/10 is transformed into the target f\/30 system, ensuring every ray of light passes through the delicate etalon perpendicularly. This precise illumination is the only way to prevent bandpass shift and preserve uniform detail from the center of the solar disk to the limb.\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\u003eThe Telecentric Principle: A Parallel Light Path, Not Just Magnification\u003c\/h3\u003e\n\u003cp\u003eA telecentric system is designed to place its exit pupil at infinity. The result is that principal rays from any point in the field of view strike the image plane parallel to the main optical axis, as if they originated from the center of the field. This is fundamentally different from a Barlow, where off-axis rays are still angled. This parallel light path is the key to the TZ-3's function, guaranteeing that the filter's bandpass remains constant and does not shift toward shorter wavelengths at the edge of the field.\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\u003eA Mandatory Component for Sub-Angstrom Solar Etalons\u003c\/h3\u003e\n\u003cp\u003eFor any H-alpha observation with a filter narrower than 1 Angstrom, a telecentric system is not optional—it is mandatory. Feeding a non-parallel, or conical, light beam into a sub-angstrom etalon destroys its contrast. An etalon rated for 0.5Å performance might deliver only 0.7Å or worse if used with a standard Barlow at the same focal ratio. The Baader TZ-3 is the prerequisite for unlocking the true, high-contrast potential of your specialized solar filter, revealing fine spicules, plage, and filament details that would otherwise be lost to bandpass artifacts.\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\u003eBaader TZ-3 vs. A Standard Barlow Lens: Why It Matters\u003c\/h3\u003e\n\u003cp\u003eWhile both a Barlow and a Telecentric system increase focal length, their impact on a narrowband filter is radically different. A Barlow lens simply makes the light cone narrower; it does not make the rays parallel.\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaader TZ-3:\u003c\/strong\u003e Creates a true, parallel optical path. The etalon sees the same perpendicular light rays across the entire field, preserving the specified bandpass and delivering maximum contrast uniformly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarlow Lens:\u003c\/strong\u003e Creates a converging light cone. Off-axis rays still enter the etalon at an angle, causing a spectral shift that degrades contrast and resolution, especially away from the center of the field. Using a Barlow in a serious H-alpha system is a fundamental optical mismatch.\u003c\/li\u003e\n\u003c\/ul\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\"\u003eWhy is the Baader TZ-3 essential for my sub-angstrom H-alpha filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eSub-angstrom H-alpha filters, known as etalons, require a perfectly parallel light path (collimated beam) to function correctly. The \u003cstrong\u003eBaader TZ-3\u003c\/strong\u003e is specifically designed to create this beam. Using a standard Barlow lens, even if it achieves the same f-ratio, will result in a conical light path that degrades the filter's performance, severely reducing contrast and detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the Baader TZ-3 different from a standard 3x Barlow lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA Barlow lens only magnifies the image by making the light cone narrower. A telecentric system, like the \u003cstrong\u003eBaader TZ-3\u003c\/strong\u003e, fundamentally re-engineers the optical path to make the light rays parallel to the central axis. This is a critical distinction for narrowband filters, as angled rays cause the filter's bandpass to shift, smearing out fine solar details.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader TZ-3 for lunar or planetary imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the TZ-3 is optimized for the specific requirements of solar etalons, it can be used as a high-quality 3x focal extender for other targets. However, its primary design goal is to produce a telecentric beam, which is not a requirement for standard planetary imaging where a high-quality Barlow may offer a more compact and cost-effective solution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat happens if I use a Barlow instead of the Baader TZ-3 with my SolarSpectrum filter on my f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eEven if you use a 3x Barlow to achieve f\/30, the light entering your SolarSpectrum filter will still be in a converging cone. This will cause a bandpass shift across the field of view. The center of the sun might look sharp, but the detail and contrast towards the limb will be significantly reduced, and the filter will not perform to its specified sub-angstrom rating.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy telescope is f\/7. How does the Baader TZ-3 help me for H-alpha?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn f\/7 telescope with the 3x TZ-3 would result in an f\/21 system. This is faster than the ideal f\/30 target for many etalons. To compensate, you would need to use an aperture mask or iris diaphragm on your telescope's objective to reduce its effective aperture, thereby slowing the system down to the required f\/30, ensuring optimal filter performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the Baader TZ-3 recommended over the older TZ-4 for some setups?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader TZ-3 features a more modern optical calculation and better clear aperture matching for many modern filter systems. It is often better to use the TZ-3 and slightly reduce your telescope's main aperture to reach the target f\/30 than to use an older, mismatched 4x system that may introduce vignetting or other optical compromises.\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\u003eFocal Length Multiplier\u003c\/td\u003e\n\u003ctd\u003e3x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical System\u003c\/td\u003e\n\u003ctd\u003eTelecentric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Application\u003c\/td\u003e\n\u003ctd\u003eNarrowband H-alpha Solar Filters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsage\u003c\/td\u003e\n\u003ctd\u003efor H-alpha observation with SolarSpectrum filters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T-2), 2\"\/SCT Thread (50.8mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003e2\"\/SCT Thread (50.8mm)\u003c\/td\u003e\n\u003c\/tr\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\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_SolarSpectrum_H-alpha_Filter_Telecentric_Systems_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium SolarSpectrum H-alpha Filter Telecentric Systems Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Telecentric_Systems_TZS_for_H-alpha_Filters_Product_Information.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Telecentric Systems TZS for H-alpha Filters Product Information\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967382188317,"sku":"BAA-2459257","price":648.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Telecentric-System-TZ-3-3x-Research-Grade-1__65124.1597111122.1280.1280.jpg?v=1684341500"},{"product_id":"baader-telecentric-system-tz-4-4x","title":"Baader Telecentric System TZ-4 - 4x","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e4x Telecentric Focal Extender\u003c\/li\u003e\n\u003cli\u003eEngineered for Narrowband H-alpha Solar Filters\u003c\/li\u003e\n\u003cli\u003eCreates a Parallel f\/30 Light Path\u003c\/li\u003e\n\u003cli\u003eOptimized Coatings for 656nm Wavelength\u003c\/li\u003e\n\u003cli\u003eProvides 230mm of Back Focus for Accessories\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\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\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\u003eBaader Telecentric System TZ-4 - 4x\u003c\/h2\u003e\n      \u003cp\u003eThe Baader Telecentric System TZ-4 is an essential optical component designed specifically for high-resolution H-alpha solar imaging, delivering a 4x focal length amplification. It transforms a native f\/7.5 telescope into the mandatory f\/30 parallel light path required by sub-Angstrom etalon filters. With coatings optimized for the critical 656nm H-alpha wavelength and a generous 230mm of working distance, the TZ-4 ensures your entire optical train works in perfect harmony for maximum contrast and uniformity.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eTrue Telecentric Design: A Parallel Light Path for \u0026lt;1Å Etalons\u003c\/h3\u003e\n      \u003cp\u003eUnlike a standard Barlow lens that creates a diverging cone of light, a telecentric system produces a beam where the principal light rays remain parallel to the optical axis across the entire field of view. This is absolutely mandatory for narrowband solar filters with a bandpass below 1 Angstrom. A parallel beam ensures that light enters the etalon at the correct angle everywhere on the sensor, preventing bandpass shift that would otherwise degrade contrast and create uneven illumination.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n    \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eOptimized for H-alpha: f\/30 Performance at 656nm\u003c\/h3\u003e\n      \u003cp\u003eThe TZ-4 is engineered to convert an f\/7.5 instrument into an f\/30 system, the ideal focal ratio for most high-end solar etalons. All optical surfaces feature multi-layer coatings precisely matched to the glass types used, maximizing light transmission at the 656nm H-alpha line. If your telescope's native focal ratio deviates significantly, the aperture can be stopped down with an optional iris to achieve the target f\/30 ratio, ensuring your filter performs at its theoretical best.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eGenerous 230mm Back Focus: Room for Diagonals and Cameras\u003c\/h3\u003e\n      \u003cp\u003eA key practical advantage of the TZ-4 is the 230mm of back focus available, measured from the rear lens surface to the camera sensor. This substantial distance provides ample room to insert a Solar Spectrum filter housing, a 2\" mirror diagonal for more comfortable viewing angles, and your imaging camera without running out of space. This flexibility allows for robust and stable imaging train configurations that are difficult to achieve with other focal extenders.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eTZ-4 vs. TZ-3: Understanding the Baader Telecentric Lineup\u003c\/h3\u003e\n      \u003cp\u003eThe TZ-4 is a legacy component in Baader's telecentric lineup. For many applications, the newer Baader TZ-3 represents a more modern and optically superior calculation. It is often recommended to start with a TZ-3 and stop down the telescope's aperture to reach the target f\/30, as this can yield higher contrast than using a TZ-4 on a poorly matched system. While a newly calculated, large-aperture TZ-4 is in development, the current model serves specific needs for achieving a 4x amplification factor where required.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy can't I use a 4x Barlow with my Solar Spectrum filter instead of the Baader TZ-4?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eA Barlow lens creates a diverging light cone, meaning light rays at the edge of the field strike the filter at a different angle than those in the center. This causes a \u003cstrong\u003ebandpass shift\u003c\/strong\u003e, degrading contrast and detail. The \u003cstrong\u003eBaader TZ-4 creates a parallel light path\u003c\/strong\u003e, ensuring every ray of light enters the etalon at the correct angle, preserving the filter's specified performance across the entire solar disk.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat telescope focal ratio works best with the Baader TZ-4 for solar imaging?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe Baader TZ-4 is designed to work optimally with a telescope that has a native focal ratio of approximately \u003cstrong\u003ef\/7.5\u003c\/strong\u003e. This combination produces the target \u003cstrong\u003ef\/30\u003c\/strong\u003e beam required by many narrowband H-alpha etalons. If your telescope is faster or slower, you may need to use an iris diaphragm to stop down the aperture to achieve this ideal f\/30 ratio.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow much space does the TZ-4 leave for my H-alpha etalon and camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe Baader TZ-4 provides a generous working distance of \u003cstrong\u003e230mm\u003c\/strong\u003e from its rearmost lens to the focal plane. This is typically sufficient space to accommodate the etalon filter housing, a 2\" diagonal, and your imaging camera without issue.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eMy telescope isn't f\/7.5. Can I still use the TZ-4 to get to f\/30 for solar imaging?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. While the TZ-4 is optimized for a starting f\/7.5 system, you can use it with other telescopes by adjusting the effective aperture. For a faster telescope (e.g., f\/6), you would need to use an \u003cstrong\u003eaperture stop or iris diaphragm\u003c\/strong\u003e in front of the objective lens to reduce the incoming light, effectively changing the focal ratio to the f\/7.5 needed to achieve a final f\/30 output.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eThe documentation mentions the TZ-3 is a better design. Why would I buy the Baader TZ-4?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe Baader TZ-4 is an older, established design that provides a specific \u003cstrong\u003e4x amplification factor\u003c\/strong\u003e. You would choose the TZ-4 if this exact magnification is required to bring your specific telescope to the necessary f\/30 focal ratio. For new systems, Baader often recommends the newer TZ-3 due to its more advanced optical calculation, suggesting it may provide better contrast even if it requires stopping down the telescope's aperture.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"telecentric\" actually mean for my solar images from the TZ-4?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eFor your images, \"telecentric\" means \u003cstrong\u003euniformity and maximum contrast\u003c\/strong\u003e. Because the light passing through your etalon is perfectly parallel everywhere, the filter's narrow bandpass is maintained across the entire sensor. This prevents bright or dark blotches (sweet-banding) and ensures that fine details like spicules and filaments are visible with the highest possible contrast from edge to edge.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.31\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal length extension\u003c\/td\u003e\n\u003ctd\u003e4-fach\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eø 2\" (50.8mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_SolarSpectrum_H-alpha_Filter_Telecentric_Systems_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium SolarSpectrum H-alpha Filter Telecentric Systems Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Telecentric_System_TZ-2_Working_Distance_Notes.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Telecentric System TZ-2 Working Distance Notes\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Telecentric_Systems_TZS_for_H-alpha_Filters_Product_Information.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Telecentric Systems TZS for H-alpha Filters Product Information\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_M68_Tele-Compendium_Telescope_Connector_Guide.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium M68 Tele-Compendium Telescope Connector Guide\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967382253853,"sku":"BAA-2459256","price":657.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Telecentric-System-TZ-4-4x-1__98750.1597111122.1280.1280.jpg?v=1684341504"},{"product_id":"baader-planetarium-ffc-all-in-one-t-2-set-3-4x-magnification-for-1-25-inch-and-t-2-cameras","title":"Baader Planetarium FFC All-in-One T-2 Set – 3–4x magnification for 1.25\" and T-2 cameras","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eVariable Magnification: 3x to 8x+\u003c\/li\u003e\n\u003cli\u003eOptical Design: 4-Element with 2x CaF2 Fluorite Lenses\u003c\/li\u003e\n\u003cli\u003eImage Circle: 90mm Flat Field at 4x Magnification\u003c\/li\u003e\n\u003cli\u003eSet Magnification Range: 3x to 4x\u003c\/li\u003e\n\u003cli\u003eConnectivity: Baader T-2 System\u003c\/li\u003e\n\u003cli\u003eCompatibility: 1.25\" Eyepieces and T-2 Threaded Cameras\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\u003eDownloads\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\u003eFFC All-in-One T-2 Set – 3–4x magnification for 1.25\" and T-2 cameras\u003c\/h2\u003e\n\u003cp\u003eThe Baader Fluorite-Flatfield-Converter (FFC) All-in-One T-2 Set is an uncompromising projection system, built around a 4-element optical core that includes two genuine fluorite (CaF2) crystals to achieve unparalleled sharpness. It delivers a variable magnification from 3x up to 8x, producing a perfectly flat field across a massive 90mm image circle at its optimal 4x setting. This complete set provides all the necessary T-2 adapters to achieve a 3x to 4x magnification range with both 1.25\" eyepieces and T-2 threaded cameras.\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\u003eA 4-Element, Dual-Fluorite Design for Ultimate Sharpness\u003c\/h3\u003e\n\u003cp\u003eDeveloped in 1997 with a designer of the legendary Zeiss APQ lenses, the FFC was conceived as the ultimate projection system for high-resolution imaging. Its 4-element, 2-group design incorporates two calcium fluorite (CaF2) lenses—an extreme glass type that enables apochromatic correction across a very broad spectral range. The result is a uniquely transparent and sharp optical system with a claimed line resolution ten times that of a Zeiss Abbe eyepiece.\u003c\/p\u003e\n\u003cp\u003eWhile extremely difficult to produce and coat, the fluorite elements are the key to the FFC's performance. For planetary, lunar, and solar imagers, this design translates to the highest possible contrast and resolution, capturing details limited only by your telescope and atmospheric seeing.\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\u003eVariable 3x–8x Magnification Across a 90mm Flat Field\u003c\/h3\u003e\n\u003cp\u003eThe FFC's magnification is not fixed; it is determined by the distance between the optics and the focal plane of your eyepiece or camera sensor. This set includes the necessary T-2 extension tubes to achieve approximately 3x magnification at a 96mm distance and 4x at a 150mm distance. With additional T-2 extensions (sold separately), magnification can be pushed to 8x and beyond.\u003c\/p\u003e\n\u003cp\u003eAt its design-optimized 4x magnification, the FFC projects a tack-sharp, completely flat image across an enormous 90mm circle. This fully illuminates even the largest commercially available astronomy camera sensors without compromise, making it a definitive choice for imagers who require perfect edge-to-edge performance on large-format chips.\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\u003eThe All-in-One T-2 System for 1.25\" Eyepieces and Cameras\u003c\/h3\u003e\n\u003cp\u003eThis set integrates the FFC optic into Baader's Astro T-2 System, providing a complete solution for both visual and photographic use. Two included T-2 quick changers allow you to instantly switch between an eyepiece and a camera, or swap between different extension tube configurations for different magnifications. The system is built around these key components:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eT-2 Extension Tubes:\u003c\/strong\u003e These are used to precisely set the optical distance required to achieve your desired magnification between 3x and 4x.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaader ClickLock Clamp:\u003c\/strong\u003e Securely holds any 1.25\" eyepiece or accessory with a simple twist, preventing slippage or marring of barrels, even with heavy equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT-2 Quick Changers:\u003c\/strong\u003e Allow for rapid changes between imaging and visual setups and provide a point of rotation for camera framing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2\" Nosepiece:\u003c\/strong\u003e Provides the necessary optical path length to reach focus in most telescopes without requiring a star diagonal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eHandling CaF2: Acclimatizing from +20°C to -20°C\u003c\/h3\u003e\n\u003cp\u003eThe FFC's exceptional optical properties are due to its genuine fluorite lenses, which are sensitive to thermal shock. Sudden, large temperature changes can cause stress within the crystal. You must not take the FFC directly from a warm +20°C house into an icy -20°C winter night without allowing it to acclimate slowly.\u003c\/p\u003e\n\u003cp\u003eTo prevent damage, the FFC's transport case is designed to act as a thermal buffer. When setting up your telescope, leave the FFC in its closed case for up to an hour to allow it to cool down gradually with the ambient air. This simple procedure protects the sensitive optics and ensures a lifetime of uncompromising performance.\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 makes the Baader FFC different from a standard Barlow lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader FFC is a more complex optical system designed as a flat-field apochromatic projector, not a simple magnifier. It uses \u003cstrong\u003efour lens elements, including two fluorite (CaF2) crystals\u003c\/strong\u003e, to deliver exceptional sharpness across a very wide, flat 90mm image circle. Standard Barlows typically use two or three non-fluorite lenses and are not corrected for a large, flat field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I change the magnification with the FFC All-in-One T-2 Set?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou change magnification by altering the distance from the FFC optics to your camera sensor or eyepiece. The \u003cstrong\u003eBaader FFC All-in-One T-2 Set includes a system of T-2 extension tubes\u003c\/strong\u003e to accomplish this. For approximately \u003cstrong\u003e3x magnification, you need a distance of 96mm\u003c\/strong\u003e, and for \u003cstrong\u003e4x, a distance of 150mm\u003c\/strong\u003e. The included T-2 quick changers allow you to easily swap between different extension tube combinations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader FFC All-in-One Set with my large-format camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The Baader FFC is specifically designed for this purpose. At its optimal 4x magnification, it produces a \u003cstrong\u003eperfectly flat, fully illuminated 90mm image circle\u003c\/strong\u003e. This is large enough to cover the biggest astronomy sensors on the market with no vignetting or loss of edge sharpness, making it an ideal choice for serious imagers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is there a special warning about temperature for the Baader FFC?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader FFC's two \u003cstrong\u003efluorite (CaF2) lenses are sensitive to thermal shock\u003c\/strong\u003e. A rapid change in temperature (e.g., from a warm house to a freezing night) can cause internal stress in the lens elements. To protect the optics, you must allow the FFC to acclimate slowly inside its protective case for up to an hour before use in extreme temperature differences.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do the T-2 quick changers in the FFC All-in-One Set allow me to do?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe two T-2 quick changers provide significant operational flexibility. They allow you to:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstantly switch between a visual setup (with the 1.25\" ClickLock) and an imaging setup (with a T-2 camera).\u003c\/li\u003e\n\u003cli\u003eEasily rotate your camera for perfect framing without loosening any threaded connections.\u003c\/li\u003e\n\u003cli\u003eQuickly swap between pre-assembled stacks of extension tubes to change magnification factors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would I use the Baader FFC All-in-One Set for high-resolution imaging of Jupiter with my T-2 planetary camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor imaging Jupiter with a planetary camera, you would assemble the Baader FFC and T-2 extension tubes to achieve a focal ratio between f\/20 and f\/25. You would start by inserting the 2\" nosepiece into your telescope's focuser, followed by the FFC housing. Then, you would add T-2 extension tubes to reach the ~150mm distance for 4x magnification (or adjust as needed) before attaching your T-2 camera. The T-2 quick changer allows you to easily rotate the camera to align with Jupiter's cloud belts.\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\u003eMagnification Range (System)\u003c\/td\u003e\n\u003ctd\u003e3x – 8x+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification Range (Included Set)\u003c\/td\u003e\n\u003ctd\u003e3x – 4x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003e4-Element \/ 2-Group Fluorite-Flatfield-Converter (FFC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKey Optical Elements\u003c\/td\u003e\n\u003ctd\u003e2x Calcium Fluorite (CaF2) Lenses\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIlluminated Field (at 4x)\u003c\/td\u003e\n\u003ctd\u003e90 mm (Flat Field)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Connectivity\u003c\/td\u003e\n\u003ctd\u003eBaader Astro T-2 System, 2\" Barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003e1.25\" Eyepieces, T-2 Threaded Cameras\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eGermany\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e-54, 797 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-Coating\u003c\/td\u003e\n\u003ctd\u003eHigh transmission multi-coated (HT-MC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThreaded for filters\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eø 2\" (50.8mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_FFC_All-in-One_T-2_Set_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_FFC_All-in-One_T-2_Set_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium FFC All-in-One T-2 Set Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":52913247093021,"sku":"BAA-2458281","price":1449.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/BaaderPlanetarium-FFC-All-in-One-T-2-Set-3-4x-magnification-for-1-and-T-2-cameras-1_bb0cb326-81b5-48a5-a158-e986fad03e35.jpg?v=1789088679"}],"url":"https:\/\/davidastro.com\/en-us\/collections\/baader-barlow-lenses.oembed","provider":"David Astro","version":"1.0","type":"link"}