{"title":"Herschel Wedges","description":null,"products":[{"product_id":"baader-cool-ceramic-safety-herschel-prism-visual-photographic","title":"Baader Cool-Ceramic Safety Herschel Prism (Visual\/Photographic)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eProfessional-grade white-light solar observing and imaging\u003c\/li\u003e\n\u003cli\u003eCool-Ceramic prism design for safe heat dissipation\u003c\/li\u003e\n\u003cli\u003eIntegrated solar finder for rapid, safe alignment\u003c\/li\u003e\n\u003cli\u003e2-inch ClickLock clamp for secure, self-centering connection\u003c\/li\u003e\n\u003cli\u003eIncludes specialized Solar Continuum and Neutral Density filters\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 Cool-Ceramic Safety Herschel Prism (Visual\/Photographic)\u003c\/h2\u003e\n\u003cp\u003eThe Baader 2\" Cool-Ceramic Safety Herschel Prism is engineered for the highest possible contrast and resolution in white-light solar observation, fitting standard 2\" focusers. By using a first-surface prism to reflect a tiny, safe fraction of the Sun's light to the eyepiece and diverting the rest into a heat-absorbing ceramic tile, this 2\" diagonal reveals intricate details in sunspot umbrae and granulation that are lost with traditional objective filters.\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 2\" Cool-Ceramic Prism for Superior Solar Contrast\u003c\/h3\u003e\n\u003cp\u003eUnlike front-mounted solar films or glass filters that are exposed to atmospheric turbulence and tube currents, a Herschel prism is placed at the rear of a refractor telescope. This position minimizes image degradation, allowing the full, unobstructed aperture of your telescope to deliver maximum theoretical resolution. The result is a sharper, higher-contrast image of the solar photosphere, free from the slight image softening inherent in full-aperture filters.\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\u003eIntegrated Filtration for the 2\" Light Path\u003c\/h3\u003e\n\u003cp\u003eA Herschel prism requires additional filtration to reduce the Sun's brightness to a safe and comfortable level. Both the visual and photographic versions of the Baader Herschel Prism include the necessary filters, pre-installed in a dedicated holder. A specialized Solar Continuum filter isolates a specific wavelength to dramatically increase surface contrast, making granulation and sunspot details pop, while a set of neutral density (ND) filters allows you to precisely tune the final image brightness for your specific telescope, camera, or observing preference.\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\u003eFast Alignment with the Sunseeker and 2\" ClickLock Clamp\u003c\/h3\u003e\n\u003cp\u003eSafely aiming a telescope at the Sun is a critical challenge, which the Baader Herschel Prism solves with its integrated ceramic sun-finder. This \"Sunseeker\" acts as a projection screen, showing a clear image of the solar disk when the telescope is correctly aligned, eliminating the need to look for shadows or use a separate finder. For a rock-solid connection, the Baader 2\" ClickLock clamp secures your eyepiece or camera with a simple twist, providing a perfectly centered, mar-free grip that won't loosen during an observing 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\u003eWhy a 2\" Herschel Prism Outperforms Most Objective Filters\u003c\/h3\u003e\n\u003cp\u003eFor discerning solar observers using refractor telescopes, the choice between a Herschel prism and a front-mounted filter comes down to ultimate image fidelity. While an objective filter is a safe and versatile option that works on any telescope design, a Herschel prism offers distinct advantages.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher Contrast:\u003c\/strong\u003e By rejecting scattered light more efficiently, a prism delivers a darker sky background and enhances the subtle details within sunspots and faculae.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncreased Sharpness:\u003c\/strong\u003e The optical surfaces of the prism are polished to a much higher precision than is possible with thin film or mass-produced glass filters, preserving the finest details your telescope can resolve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrade-Off:\u003c\/strong\u003e The primary limitation is that Herschel prisms are safe for use with \u003cstrong\u003erefractor telescopes only\u003c\/strong\u003e. They must never be used with Schmidt-Cassegrains, Maksutovs, or any reflector design, as the trapped heat would destroy the secondary mirror and internal components.\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 can the Baader Herschel Prism only be used with refractor telescopes?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader Herschel Prism is designed to pass nearly all of the Sun's focused heat and light through its body, where it is safely dissipated by the rear-mounted ceramic tile. In a reflector or catadioptric telescope (like an SCT or Mak), this concentrated energy would strike and destroy the secondary mirror and other internal components, causing catastrophic damage to the instrument and posing a severe safety risk.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the difference between the Visual and Photographic Baader Herschel Prism?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary difference is the selection of included Neutral Density (ND) filters. The \u003cstrong\u003ePhotographic version\u003c\/strong\u003e includes a wider range of ND filters, offering more granular control over the final image brightness to perfectly match a camera's required exposure time. The \u003cstrong\u003eVisual version\u003c\/strong\u003e includes the essential ND filter needed for safe direct observation with an eyepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat solar features can I see with the Baader Cool-Ceramic Herschel Prism?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is a white-light solar filter, ideal for observing the Sun's photosphere. With the Baader Herschel Prism, you can expect to see:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSunspots:\u003c\/strong\u003e View intricate detail in the dark umbra and the lighter penumbra.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGranulation:\u003c\/strong\u003e The \"rice grain\" texture of the solar surface is much more apparent than with objective filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFaculae:\u003c\/strong\u003e These bright, blotchy areas are best seen near the solar limb.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYou will \u003cstrong\u003enot\u003c\/strong\u003e see prominences or flares, which require a specialized Hydrogen-alpha telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the included Solar Continuum filter improve views of sunspots?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Solar Continuum filter is a narrow-bandpass filter centered on a specific green wavelength. This band is ideal for enhancing photospheric features like sunspots and granulation by increasing contrast and reducing the effects of atmospheric turbulence. It provides a more stable, detailed view than observing in full-spectrum white light alone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Baader Herschel Prism safe for my eyes?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, when used correctly. The Baader Safety Herschel Prism is designed with multiple safety features. The prism itself reflects only a small fraction of light, and the essential, permanently installed ND and Solar Continuum filters reduce the brightness to a completely safe level for visual observation. The enclosed housing also prevents anyone from accidentally looking into the unfiltered light path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to stack filters with the Baader Herschel Prism?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader Herschel Prism comes with the necessary filters for immediate, safe use. The Photographic version provides multiple ND filters that can be swapped to achieve the ideal exposure, but for visual use, the pre-selected filter combination is all that is required. You should never remove the built-in primary ND filter or use the prism without an eyepiece and filter in place.\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\u003eAvailable Options\u003c\/td\u003e\n\u003ctd\u003ePhotographic, Visual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e1.74 (Photographic)\u003cbr\u003e1.60 (Visual)\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\u003eClamping System\u003c\/td\u003e\n\u003ctd\u003eClickLock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical length (mm)\u003c\/td\u003e\n\u003ctd\u003e115 mm without filter | With two filters of 2 mm glass thickness (ND 3, SCT): 112.4 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eø 2\" (50.8mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003e2\"\/SCT Thread (50.8mm), M55, S58\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eM48, 2\"\/SCT Thread (50.8mm), M55\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), S58\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eHerschel Prism\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Orientation\u003c\/td\u003e\n\u003ctd\u003eErect image, Mirror inverted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReflection surface\u003c\/td\u003e\n\u003ctd\u003eFirst surface reflection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Wavelength\u003c\/td\u003e\n\u003ctd\u003eWhitelight (integral light)\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_Cleaning_and_Maintenance_of_Optics_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 Cleaning and Maintenance of Optics 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":"Photographic","offer_id":44967382057245,"sku":"BAA-2956510P","price":940.0,"currency_code":"CAD","in_stock":true},{"title":"Visual","offer_id":44967382090013,"sku":"BAA-2956510V","price":838.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader-Cool-Ceramic-Safety-Herschel-Prism-Visual-Photographic-1__49933.1597111118.1280.1280.jpg?v=1684341716"},{"product_id":"lunt-herschel-wedge-2","title":"Lunt Herschel Wedge - 2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFor White Light Solar Observing\u003c\/li\u003e\n\u003cli\u003eProvides Superior Image Contrast and Sharpness\u003c\/li\u003e\n\u003cli\u003eIntegrated Neutral Density Filter for Safe Imaging\u003c\/li\u003e\n\u003cli\u003eDesigned for Refractors with up to 6\" of Aperture\u003c\/li\u003e\n\u003cli\u003e2\" Barrel and Eyepiece Holder\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\u003eLunt Herschel Wedge - 2\"\u003c\/h2\u003e\n\u003cp\u003eThe Lunt 2\" Herschel Wedge is engineered for uncompromising white light solar observation, delivering superior contrast for viewing and imaging the sun's photosphere. It is designed for use in refractor telescopes up to 6\" in aperture and includes an integrated ND3 filter for safe, direct-to-camera solar imaging. This 2\" diagonal provides a high-fidelity alternative to front-mounted solar films or glass filters, revealing finer details in sunspots and granulation.\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 Highest-Contrast Views of the Solar Photosphere\u003c\/h3\u003e\n\u003cp\u003eA Herschel wedge, or solar diagonal, provides the sharpest and highest-contrast views of the sun's surface possible in white light. Unlike traditional filters that fit over the front of your telescope, the wedge uses a precision prism to reject most of the sun's energy, passing only a small, safe fraction to the eyepiece. This method minimizes internal reflections and scattered light, resulting in a darker sky background and resolving finer details in sunspot umbra, penumbra, and solar granulation.\u003c\/p\u003e\n\u003cp\u003eThe Lunt 2\" Herschel Wedge includes a factory-installed ND3 filter, which provides the necessary light reduction for safe use with imaging cameras. For visual observation, an additional polarizing filter (sold separately) is recommended; threading one onto your eyepiece allows you to rotate the eyepiece to adjust the view to a comfortable brightness.\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\u003eEngineered for Refractors up to 6\" in Aperture\u003c\/h3\u003e\n\u003cp\u003eThis solar diagonal is designed exclusively for use with refractor telescopes, as reflecting telescopes (like Newtonians or SCTs) have a secondary mirror that can be damaged by the concentrated solar energy. The Lunt 2\" Wedge is optimized for refractors with apertures of 6\" or less, safely managing the thermal load from these instruments.\u003c\/p\u003e\n\u003cp\u003eIts mechanical design replaces your standard star diagonal, and if your telescope can achieve focus with a typical diagonal, it will reach focus with the Lunt Wedge. The 2\" barrel fits securely into any standard 2\" focuser, and the eyepiece holder accepts 2\" eyepieces and accessories, allowing for wide-field scans of the entire solar disk.\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\u003eLunt 2\" vs. 1.25\" Wedge: Matching the Diagonal to Your Aperture\u003c\/h3\u003e\n\u003cp\u003eLunt offers two sizes of their Herschel Wedge to match different telescopes. While the smaller 1.25\" model is an excellent, compact choice for refractors up to 4\" in aperture, this 2\" model is the required choice for larger instruments.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25\" Lunt Wedge:\u003c\/strong\u003e Best suited for smaller, portable refractors up to 4\" in aperture. It is lighter and more compact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2\" Lunt Wedge:\u003c\/strong\u003e This model is necessary for refractors between 4\" and 6\" in aperture to properly and safely handle the increased light and heat. It also offers the advantage of using 2\" eyepieces, providing a much wider true field of view.\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\"\u003eIs the Lunt 2\" Herschel Wedge safe for my eyes right out of the box?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe wedge includes a built-in \u003cstrong\u003eND3 filter\u003c\/strong\u003e that makes it safe for imaging. However, for direct visual use, the image will still be extremely bright. Lunt strongly recommends adding a separate \u003cstrong\u003epolarizing filter\u003c\/strong\u003e to the barrel of your eyepiece. By rotating the eyepiece, you can then dim the image to a comfortable level for safe visual observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Lunt 2\" Herschel Wedge on my 8\" SCT or Newtonian reflector?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eAbsolutely not.\u003c\/strong\u003e A Herschel wedge must only be used with a refractor telescope. In a reflector or Schmidt-Cassegrain, the wedge would be placed after the primary and secondary mirrors, which would concentrate intense heat and light on the secondary mirror and internal components. This will cause catastrophic damage to your telescope and can lead to permanent eye injury.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will sunspots look through the Lunt 2\" Wedge in my 120mm f\/7 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe view will be exceptionally detailed. You can expect to see sharp, high-contrast definition between the dark umbra and the filamentary penumbra of sunspots. The wedge will also reveal the granular texture of the entire solar surface (the photosphere), which often appears as a subtle \"rice grain\" pattern under steady seeing conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy should I choose the Lunt 2\" wedge over the 1.25\" model for my 5\" refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e2\" Lunt Wedge\u003c\/strong\u003e is specifically recommended for any refractor with an aperture of 4\" or more. The larger prism and housing are designed to better manage the heat and light gathered by the larger objective lens. Additionally, the 2\" model allows you to use 2\" eyepieces, enabling much wider true fields of view compared to the 1.25\" format.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I see solar flares or prominences with the Lunt 2\" Herschel Wedge?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Lunt Herschel Wedge is a \u003cstrong\u003ewhite light\u003c\/strong\u003e solar device, meaning it is designed to show the surface of the sun (the photosphere). Features like prominences, flares, and filaments are visible in a narrow band of light called Hydrogen-alpha and require a specialized, dedicated H-alpha solar telescope or filter system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I have trouble reaching focus with the Lunt 2\" Herschel Wedge?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eGenerally, no. The optical path length of the Lunt Wedge is designed to be very similar to that of a standard 2\" star diagonal. If your refractor and eyepiece combination can reach focus with a normal diagonal, you should be able to reach focus with the Herschel wedge without any issues.\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\u003eMPN\u003c\/td\u003e\n\u003ctd\u003eLS2HW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003eLS1.25HW\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\/Lunt_Solar_Systems_White_Light_Solar_Wedge_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\u003ca href=\"https:\/\/davidastro.com\/pages\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":44967534625053,"sku":"LSS-LS2HW","price":525.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-White-Light-Solar-Wedge-2-inch-1__64330.1598229592.1280.1280.jpg?v=1684343610"},{"product_id":"lunt-herschel-wedge-1-25","title":"Lunt Herschel Wedge - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e1.25\" Barrel Diameter\u003c\/li\u003e\n\u003cli\u003eFor Refractors up to 4\" Aperture\u003c\/li\u003e\n\u003cli\u003eIntegrated ND 3.0 Safety Filter\u003c\/li\u003e\n\u003cli\u003eOptimized for White-Light Solar Observing and Imaging\u003c\/li\u003e\n\u003cli\u003eReplaces a Standard 1.25\" Star Diagonal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eLunt Herschel Wedge - 1.25\"\u003c\/h2\u003e\n\u003cp\u003eThe Lunt 1.25\" Herschel Wedge provides the highest-contrast and sharpest possible white-light solar views for refractors up to 4\" in aperture. By utilizing a precision prism to safely divert excess energy and incorporating a permanently installed ND3 filter, this wedge delivers views of sunspot details and granulation that are superior to traditional front-mounted film or glass filters.\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-Contrast Solar Views for Refractors up to 4\"\u003c\/h3\u003e\n\u003cp\u003eA Herschel wedge, or solar wedge, is the optimal solution for high-resolution white-light solar observing. Unlike a filter placed on the front of your telescope, the wedge allows an unfiltered beam of light to enter the instrument, preventing the image degradation and scattering that can soften details. This Lunt 1.25\" wedge is specifically designed for refractors up to 4\" in aperture, making it the ideal solar accessory for a wide range of high-quality portable telescopes.\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\u003eBuilt-in ND3 Filter for Safe Solar Imaging\u003c\/h3\u003e\n\u003cp\u003eSafety is paramount in solar astronomy. The Lunt Herschel Wedge manages the intense energy from the sun by design, but the focused image is still far too bright for direct observation. A built-in Neutral Density (ND) 3.0 filter reduces the brightness to a level that is safe for imaging with a planetary or dedicated solar camera.\u003c\/p\u003e\n\u003cp\u003eFor visual observation, the image must be dimmed further. You can achieve a comfortable brightness level by adding a 1.25\" polarizing filter to your eyepiece and rotating the eyepiece in the diagonal to dial in the perfect view.\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\u003e1.25\" Format and Straightforward Focusing\u003c\/h3\u003e\n\u003cp\u003eDesigned to replace your telescope's standard 1.25\" star diagonal, the Lunt Herschel Wedge integrates seamlessly into your existing setup. It fits any 1.25\" focuser and accepts standard 1.25\" eyepieces and accessories. This ensures that if you can reach focus with a typical diagonal in your telescope, you will also reach focus with the Lunt Solar Wedge, eliminating concerns about focuser travel.\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\u003eLunt 1.25\" Wedge vs. the 2\" Model: Aperture and Eyepiece Choice\u003c\/h3\u003e\n\u003cp\u003eLunt offers two sizes of their white-light wedge, and the correct choice depends entirely on your telescope.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe 1.25\" Wedge (This Model):\u003c\/strong\u003e Is the correct and safe choice for any refractor with an aperture of 4 inches or less.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe 2\" Wedge:\u003c\/strong\u003e Is designed for larger refractors, from 4\" up to 6\" in aperture. It also allows the use of 2\" eyepieces for wider fields of view. Using a wedge rated for a smaller aperture on a larger telescope is not recommended.\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 Lunt 1.25\" Herschel Wedge better than a front-mounted solar filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA Herschel wedge provides superior image contrast and sharpness. Because it allows the main objective to form an image with unfiltered light, it avoids the slight image degradation caused by light passing through a front-mounted filter. This results in finer, higher-contrast details in sunspots and solar granulation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Lunt 1.25\" Herschel Wedge safe for my eyes right out of the box?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eFor imaging, yes. For visual use, you need an additional filter.\u003c\/strong\u003e The built-in ND3 filter reduces the sun's brightness to a level safe for cameras, but it is still too bright for comfortable and safe visual use. For observing with your eyes, you must add a polarizing filter to your eyepiece to further dim the view to a comfortable level.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Lunt 1.25\" Herschel Wedge on my SCT or Newtonian telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eNo, absolutely not.\u003c\/strong\u003e Herschel wedges are designed \u003cstrong\u003efor use with refractor telescopes only\u003c\/strong\u003e. Using a wedge with a reflector or catadioptric telescope (like a Schmidt-Cassegrain or Maksutov) will cause a dangerous buildup of heat inside the optical tube, which can permanently damage your telescope and cause severe eye injury.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the maximum aperture telescope for the Lunt 1.25\" Herschel Wedge?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Lunt 1.25\" Herschel Wedge is designed and rated for use on refractor telescopes with an aperture of \u003cstrong\u003e4 inches (102mm) or less\u003c\/strong\u003e. For refractors larger than 4 inches, you must use the 2\" Lunt Herschel Wedge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I adjust image brightness with the Lunt 1.25\" Wedge on my 80mm f\/6 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor visual use with your 80mm refractor, first thread a standard 1.25\" polarizing filter onto the barrel of your chosen eyepiece. After inserting the eyepiece into the wedge, you can simply rotate the eyepiece. As you turn it, you will see the image of the sun get brighter or dimmer, allowing you to set the view to your personal comfort level.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I see solar flares or prominences with the Lunt 1.25\" Wedge on my Tele Vue 76?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Lunt Herschel Wedge is a white-light solar device, meaning it shows the sun's surface (the photosphere), where you can see sunspots and granulation. Solar flares and prominences are features of the sun's atmosphere (the chromosphere) and are only visible in dedicated Hydrogen-alpha solar telescopes.\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\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003eLS1.25HW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMPN\u003c\/td\u003e\n\u003ctd\u003eLS2HW\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\u003eRecommended Max Aperture\u003c\/td\u003e\n\u003ctd\u003e4\" Refractor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntegrated Filter\u003c\/td\u003e\n\u003ctd\u003eND 3.0\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\"\u003eLunt 1.25\" Herschel \/ White-Light Solar Wedge\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":44967534723357,"sku":"LSS-LS1.25HW","price":385.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"apm-herschel-wedge-w-nd3-filter-2","title":"APM Herschel Wedge w\/ ND3 Filter - 2\"","description":"\u003c!-- more --\u003e\u003cp\u003e\u003cspan\u003e\u003cspan\u003e\u003cstrong\u003eHerschelprism with ceramic and 2 \"Fast-Lock Okularadapter\u003c\/strong\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003ca title=\"APM Herschel Wedge Manual\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_APM_Herschel_Wedge_Manual.pdf?v=1684345243\" target=\"_blank\" rel=\"noopener\"\u003eAPM Herschel Wedge Manual\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003cspan\u003e\u003cspan\u003eFor solar white light imaging and white light visual observing. The APM White Light Wedge comes with a built in ND3 filter which allows perfectly safe imaging or visual observing of the Sun\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eThe function of the Herschel prism (also called Herschelprima) is based on the principle that only a small part (approx. 5%) of the incident light is used for the actual observation. \u003c\/span\u003e\u003cspan\u003eThe part, which is incomparably larger and also energetic, is guided through the housing and forms a focal point outside the prism. \u003c\/span\u003e\u003cspan\u003eEven far behind this focal point, the light concentration is still very intense, so that (with older prisms) caution had to be exercised, so that no inexperienced observer would accidentally look into the output light beam.\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eThe APM Herschel prism is equipped with the ceramic light trap, an multicoated  integrated multicoated ND3 filter and (removable) multicoated  polarizing filter. \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cspan\u003e\u003cspan\u003e\u003cspan\u003eThe sun can be safely observed with the APM Herschel Prism.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan\u003eThe image brightness can be adjusted by t\u003c\/span\u003e\u003c\/span\u003e\u003cspan\u003e\u003cspan\u003e\u003cspan\u003e\u003cspan\u003e\u003cspan\u003e\u003cspan\u003ewisting of the 2 \"polarizing filter by rotating the 2\" eyepieceholder from  outside\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e  . \u003c\/span\u003e\u003cspan\u003eThus, the Herschel Prism can be used both visually and also photographically same good!\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eThe clear optical aperture  is 46mm!\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eThe use of the Herschel prism (in comparison with film filters) for sun observation is not only more safe , but also of better quality. \u003c\/span\u003e\u003cspan\u003eThe image  has more  contrast, imore sharpness  and allow higher magnification. \u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eImportant note: The application of the Herschel prism is only suitable for refractors and schiefspieglers .\u003cbr\u003e\u003cbr\u003eThe Production version has a white body !\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cspan\u003e\u003cspan\u003e\u003cu\u003e\u003cstrong\u003e\u003cspan\u003eThe special features of APM Herschel:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/u\u003e\u003cbr\u003e\u003cspan\u003e-  screwed on  but also removable top-pole filter in the 2\" plug-in sleeve\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e- Twisting of the 2\" polarizing filter by a lever from the outside\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e- APM Fastlock eyepiece clamp\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cu\u003e\u003cstrong\u003eAPM \u003c\/strong\u003e\u003cstrong\u003eWhite Light Wedge Packages Include:\u003c\/strong\u003e\u003c\/u\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAPM 2\" White Light Solar Wedge\u003c\/li\u003e\n\u003cli\u003eMC-coated Pre-Installed ND 3.0 Filter \u003c\/li\u003e\n\u003cli\u003eMC-coated Pre-Installed Polfilter \u003c\/li\u003e\n\u003cli\u003eMetal Carrying Case\u003c\/li\u003e\n\u003cli\u003eDie Cut Foam with room for accessories\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cdiv data-custom-tab=\"\"\u003e\n\u003cp data-custom-tab-title=\"\"\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cstrong\u003eTelescope side connection:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e2\"\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cstrong\u003eEypiece side connection:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e2\"\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cstrong\u003eClear aperature:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e46mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cstrong\u003evarible Polarisationsfilter:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eyes\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cstrong\u003eIntegrated ND3 Filter:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eyes\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"APM","offers":[{"title":"Default Title","offer_id":44967663894813,"sku":"APM-Herschel-2-DX","price":518.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/APM-Herschel-Wedge-w-ND3-Filter-2-inch-1__55010.1600124037.1280.1280.jpg?v=1684345434"},{"product_id":"antlia-imaging-herschel-wedge-with-cak-3nm-filter-1-25","title":"Antlia Imaging Herschel Wedge with CaK 3nm Filter - 1.25\"","description":"\u003c!-- more --\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eAntlia Imaging Herschel Wedge with 35mm Prism and 1.25'' Cak 3nm Solar Filter\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe Antlia Solar Wedge (Herschel Wedge design) replaces the standard prism diagonal at the rear of refractor telescopes to enable imaging of solar granulation and sunspots. The Herschel Wedge design is well known to give sharper, higher-contrast images. The Antlia Solar Wedge design transmits a greatly reduced, safe amount of light to your imaging camera. The image brightness can be conveniently increased or decreased using a control ring with aperture blades, similar to that used in camera lenses.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-CaK-Herschel-Wedge-Description.jpg?v=1687359077\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eOur Herschel Wedge is produced using CNC machining and the optical components are multi-coated with anti-reflection coatings to minimize both internal reflections and contrast reducing stray light. The solar wedge incorporates an Antlia 3nm narrow bandpass filter at the Calcium II K-Line centered on 393.3nm and mounted in a standard 1.25’’ holder.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eUnlike some other solar wedge designs which may get too hot, the Antlia Imaging Solar Wedge directs energy into an extra thick Polycrystalline Ceramic diffuser plate at the rear of the Wedge. In addition, cooling vents above the ceramic plate facilitate efficient cooling of the system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe Antlia Cak 3nm solar prism system provides for the safe management of harmful light intensity and heat when imaging the sun. The system is comprised of a prism, Cak lens filter, sun centering finder and a heat dissipation system. The sun’s light passes through the right-angle prism and excess heat is transferred to the rear fins that act as a heat sink for cooling the instrument. This heat management system effectively keeps the the instrument at safe operating temperatures.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eApplication and Performance:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eType of build: Herschel 35mm prism\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eIntegrated ceramic heat dispersion diffuser\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eSharp CaK 3nm 393.3nm solar filter screwed into eyepiece holder base\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eHigh-resolution imaging of granulation, sunspots, and other features\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eIncludes a brightness control, a solar finder and effective heat dissipation system\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eAnti Reflection (AR) coated prism and solar filter\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eHigh blocking specification to reject solar heat ingress\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eSturdy CNC machined construction\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCaK 3nm 393.3nm Filter Specifications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Antlia Solar Wedge prism and internal CaK solar filter are made of heat resistant double-polished substrate. Antlia CaK 393.3nm solar filter uses the most advanced multicoatings to produce a sharp 3nm narrow bandpass, designed to maximize contrast for high-resolution imaging of sun spots, solar surface granulation and other features that are prominent in CaK light.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA high blocking specification of OD5 (0.001%) between 200-1200nm wavelengths and OD3 (0.1%) between 1200-1500nm wavelengths delivers superb resolution for imaging with the Antlia Cak 3nm solar filter.   It should be noted that the bandpass for Cak (393nm) makes solar features almost invisible to human vision because of the eye's low sensitivity and poor resolving ability at the CaK frequency. Hence, the Antlia Solar Wedge with CaK filter is not recommended for visual observation. It is designed for imaging with cameras that have spectral responses well beyond human vision.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNever look into the sun with the K-Line filter alone, although you don’t perceive it, there is a lot of harmful UV radiation entering your eye.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePlease note:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Antlia Herschel Wedge is intended for imaging ONLY. It is not suitable for visual observation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt is not intended for solar prominence imaging and visual.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMust only be used with refractor telescopes to avoid damage to the unit.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eRefractor aperture must be no larger than 120mm or, focal ratio of F5.5 or longer.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNever use the Solar wedge without the supplied narrowband filter. Otherwise irreparable eye damage can result.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDisassembly of prism is prohibited and voids warranty. Any repair\/returns\/exchange for this item is not accepted once it has been disassembled.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWarranty guarantee: 1 year\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":45189371789597,"sku":"ANT-CAK-WEDGE","price":481.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-CaK-Herschel-Wedge.jpg?v=1687359091"}],"url":"https:\/\/davidastro.com\/collections\/herschel-wedges.oembed","provider":"David Astro","version":"1.0","type":"link"}