{"product_id":"player-one-photosphere-7-5nm-1-25-inch-filter-e-series","title":"Player One Photosphere 7.5nm Filter E-series - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEnhances Solar Photosphere Contrast\u003c\/li\u003e\n\u003cli\u003eCentral Wavelength: 540nm\u003c\/li\u003e\n\u003cli\u003eBandpass: 7.5nm Narrowband\u003c\/li\u003e\n\u003cli\u003eFormat: 1.25\" Mounted Filter\u003c\/li\u003e\n\u003cli\u003eMust Be Used With a Primary Solar Filter (Wedge\/Film)\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\u003ePlayer One Photosphere 7.5nm 1.25″ Filter E-series\u003c\/h2\u003e\n\u003cp\u003eThe Player One Photosphere 7.5nm 1.25″ Filter is a specialized solar continuum filter, isolating a narrow 7.5nm bandpass centered at 540nm to dramatically increase the contrast of solar granulation, faculae, and sunspot details. As part of Player One's E-series, this 1.25\" filter uses a high-quality glass substrate and advanced multi-layer coatings optimized for modern CMOS and CCD sensors, ensuring professional results in high-resolution solar 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\u003eHigh-Contrast Photosphere Imaging at 540nm with a 7.5nm Bandpass\u003c\/h3\u003e\n\u003cp\u003eBy targeting the 540nm wavelength, this filter operates near the peak of the Sun's light emission, delivering a bright, detailed signal to your camera. The tight 7.5nm bandpass is the key to its power, rejecting other wavelengths and significantly improving contrast by darkening the solar limb and revealing the subtle texture of the photosphere that is often lost to atmospheric turbulence or \"seeing.\"\u003c\/p\u003e\n\u003cp\u003eFor solar imagers, this provides a noticeable advantage over using a standard IR-pass filter. The Photosphere filter is specifically engineered to make the cellular structure of solar granulation and the intricate details within sunspot penumbrae stand out against the solar surface, capturing details that would otherwise be washed out.\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 Safety: A Secondary Filter for Herschel Wedges \u0026amp; Baader Film\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThis filter offers absolutely no protection when used by itself.\u003c\/strong\u003e It is an \"assistant\" or secondary filter designed to be placed in the optical path *after* a primary, energy-rejection solar filter has reduced the Sun's intense light and heat to a safe level. You must use this filter with a professional solar safety device like a Herschel wedge or Baader AstroSolar film.\u003c\/p\u003e\n\u003cp\u003eThe Player One Photosphere filter features standard 1.25\" filter threads for easy integration. For best results, it should be threaded directly onto your camera's 1.25\" nosepiece or T-adapter. This placement not only ensures correct optical performance but also helps protect your camera's sensor from dust during imaging sessions.\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\"\u003eIs the Player One Photosphere 7.5nm filter safe to use as a standalone solar filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eAbsolutely not.\u003c\/strong\u003e This is a secondary, narrowband filter for contrast enhancement only. It does not block enough of the sun's energy—including harmful UV and IR radiation—to be safe. You MUST use it in combination with a primary energy rejection filter like a Herschel wedge or certified Baader AstroSolar Film over the front of your telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhere in my imaging train should I install the Photosphere 7.5nm filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe recommended placement for the Photosphere 7.5nm filter is as close to the camera sensor as possible. Thread it onto the 1.25\" nosepiece of your astronomy camera or into a compatible T-adapter. This position minimizes internal reflections and helps shield your sensor from dust.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Photosphere 7.5nm filter improve imaging of sunspot details with an 8\" SCT and a Herschel wedge?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an 8\" SCT and a Herschel wedge, you have enough aperture to resolve fine solar details. The Photosphere 7.5nm filter enhances this by isolating the 540nm wavelength, which cuts through atmospheric seeing. This results in a much sharper and higher-contrast view of the sunspot's penumbra and the granular patterns of the surrounding photosphere, which can often appear \"soft\" without such a filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Photosphere 7.5nm filter help me see granulation with my 100mm f\/7 refractor using Baader solar film?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it can make a significant difference. While a 100mm refractor is capable of resolving granulation, seeing conditions often make it difficult. The Photosphere 7.5nm filter's narrow bandpass helps stabilize the image and boosts contrast, making the \"rice grain\" texture of the solar granulation much more apparent and easier to capture with your camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the Photosphere 7.5nm filter compared to an IR-pass filter for solar imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile an IR-pass filter can help mitigate bad seeing, the Photosphere 7.5nm filter is specifically designed for solar continuum imaging. Its 540nm central wavelength is optimized for the photosphere's peak brightness and visual detail. This provides a higher-contrast and often more detailed image of features like granulation and faculae compared to the longer wavelengths passed by an IR filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Photosphere 7.5nm filter for visual solar observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis filter is optimized for imaging with modern CMOS\/CCD cameras. While it can be used visually (always behind a primary solar filter), its effects are most pronounced in photography, where you can control exposure and processing to bring out the subtle contrast enhancements it provides.\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\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eNarrowband Solar Continuum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eE-Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral Wavelength (CWL)\u003c\/td\u003e\n\u003ctd\u003e540nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e7.5nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate\u003c\/td\u003e\n\u003ctd\u003eHigh-Quality Optical Glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eMulti-layer composite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Application\u003c\/td\u003e\n\u003ctd\u003eSolar Photosphere Imaging (Secondary Filter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Requirement\u003c\/td\u003e\n\u003ctd\u003eMust be used with a primary solar filter (Wedge\/Film)\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\"\u003ePhotosphere 7.5nm 1.25″ Filter E-series\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\"\u003eProtective Case\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\n\u003cli\u003e\n\u003cp\u003e\u003ca title=\"Player One 2-Year Warranty\" href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":52913425154333,"sku":"POA-PS125E","price":99.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/davidastro.com\/fr-us\/products\/player-one-photosphere-7-5nm-1-25-inch-filter-e-series","provider":"David Astro","version":"1.0","type":"link"}