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Player One Photosphere 7.5nm Filter E-series - 1.25"

by Player One
SKU POA-PS125E
CA$139.00 - CA$139.00
CA$139.00
CA$139.00 - CA$139.00
CA$139.00
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  • Enhances Solar Photosphere Contrast
  • Central Wavelength: 540nm
  • Bandpass: 7.5nm Narrowband
  • Format: 1.25" Mounted Filter
  • Must Be Used With a Primary Solar Filter (Wedge/Film)
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Player One Photosphere 7.5nm 1.25″ Filter E-series

    The 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.

    High-Contrast Photosphere Imaging at 540nm with a 7.5nm Bandpass

    By 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."

    For 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.

    Critical Safety: A Secondary Filter for Herschel Wedges & Baader Film

    This filter offers absolutely no protection when used by itself. 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.

    The 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.

  • Is the Player One Photosphere 7.5nm filter safe to use as a standalone solar filter?

    Absolutely not. 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.

    Where in my imaging train should I install the Photosphere 7.5nm filter?

    The 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.

    How does the Photosphere 7.5nm filter improve imaging of sunspot details with an 8" SCT and a Herschel wedge?

    With 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.

    Will the Photosphere 7.5nm filter help me see granulation with my 100mm f/7 refractor using Baader solar film?

    Yes, 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.

    What is the benefit of the Photosphere 7.5nm filter compared to an IR-pass filter for solar imaging?

    While 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.

    Can I use the Photosphere 7.5nm filter for visual solar observing?

    This 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.

  • Filter Type Narrowband Solar Continuum
    Series E-Series
    Size 1.25"
    Central Wavelength (CWL) 540nm
    Bandwidth (FWHM) 7.5nm
    Substrate High-Quality Optical Glass
    Coatings Multi-layer composite
    Primary Application Solar Photosphere Imaging (Secondary Filter)
    Safety Requirement Must be used with a primary solar filter (Wedge/Film)

    • Photosphere 7.5nm 1.25″ Filter E-series

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    • Protective Case

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  • Player One 2-Year Warranty