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Player One IR685nm 1.25″ IR-Pass Filter S-series

Player One IR685nm IR-Pass Filter S-series - 1.25"

by Player One
SKU POA-IR685
CA$39.00 - CA$39.00
CA$39.00
CA$39.00 - CA$39.00
CA$39.00
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  • Passes infrared light with wavelengths greater than 685nm
  • Standard 1.25" filter format for broad compatibility
  • Significantly improves image stability by reducing atmospheric seeing effects
  • Enhances contrast for high-resolution lunar and planetary imaging
  • S-Series construction with double-sided multi-layer coatings
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  • Description
  • FAQ
  • Specifications
  • In the Box
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  • Warranty

  • Player One IR685nm 1.25″ IR-Pass Filter S-series

    The Player One IR685nm 1.25″ IR-Pass Filter S-series isolates infrared light above the 685nm wavelength, arming your monochrome camera against poor atmospheric seeing. By blocking the shorter, more turbulent wavelengths of visible light, this filter transmits a more stable signal, allowing you to capture significantly sharper details on the Moon and planets through a standard 1.25" filter thread.

    Stabilize Seeing: Pass Only Wavelengths Above 685nm

    Atmospheric turbulence, or "seeing," is the primary barrier to sharp planetary imaging, as it scatters shorter wavelengths of light more severely. The IR685 filter combats this by creating a hard cutoff at 685nm, transmitting only deep red and near-infrared light which is far less susceptible to atmospheric distortion. This technique effectively "freezes" the image, revealing fine details that are otherwise blurred into a shimmering mess on nights of average seeing.

    High-Resolution Imaging in a 1.25" Format

    The IR685 filter is a critical tool for extracting maximum lunar and planetary detail. For lunar imaging, the increased contrast in the infrared spectrum darkens the sky and sharpens the distinction between sunlit crater rims and shadowed floors. For planetary work, it's particularly effective for revealing faint, low-contrast features, most notably the elusive cloud bands of Uranus, a target where infrared imaging makes a decisive difference.

    S-Series Construction with Double-Sided Coatings

    As part of the Player One S-series, this filter is built on a high-quality optical glass substrate for maximum image fidelity. It features an upgraded double-sided, multi-layer composite coating that ensures high transmission of the desired infrared wavelengths while reflecting unwanted light. This advanced coating technology minimizes internal reflections and artifacts, preserving the high contrast needed for serious planetary work.

  • How does the Player One IR685nm filter help when imaging Jupiter with an 8" SCT?

    On nights with unsteady air, the IR685nm filter will deliver a noticeably more stable image of Jupiter through an 8" SCT. By cutting out the turbulent blue and green light, you can use longer exposures or higher gain to capture sharp infrared data of the cloud bands and the Great Red Spot. This data can then be used as a high-detail luminance layer for an RGB color image.

    Can I use the Player One IR685nm filter to see the cloud bands on Uranus?

    Yes, this is one of the primary applications for this filter. Uranus's cloud bands are notoriously faint in visible light but show significantly more contrast in the near-infrared spectrum. Using the IR685nm filter with a monochrome camera and a telescope of sufficient aperture is a proven method for successfully imaging these challenging features.

    Is the Player One IR685nm filter suitable for color cameras?

    No, this filter is designed exclusively for monochrome cameras. A color camera's sensor has a Bayer mask (red, green, and blue pixels) that blocks most of the infrared light from reaching the sensor, and only the red pixels would receive any significant signal. To take advantage of IR imaging, a monochrome camera is required.

    What is the main advantage of using the Player One IR685nm filter for lunar photography?

    The main advantages are improved seeing and higher contrast. The IR685nm filter stabilizes the image, allowing you to resolve smaller craters, rilles, and mountain ranges. It also provides a "daylight" look to the lunar surface with very dark skies, making fine surface details stand out more clearly.

    Will the Player One IR685nm filter work with my 1.25" filter wheel?

    Yes. The Player One IR685nm filter is housed in a standard 1.25" cell with male M28.5x0.6 threads, making it fully compatible with any standard 1.25" filter wheel, filter drawer, or eyepiece that accepts threaded filters.

    How does the Player One IR685nm filter compare to a standard red filter?

    A standard red filter typically passes light from about 610nm upwards, including a significant amount of visible red light. The IR685nm filter provides a much deeper cut into the infrared, passing only light from 685nm and up. This results in a more dramatic improvement in seeing compared to a red filter, though it requires a camera with good sensitivity in the near-infrared.

  • Filter Type IR-Pass
    Cut-on Wavelength 685nm
    Size 1.25"
    Threads M28.5x0.6
    Series S-Series

    • IR685nm 1.25″ IR-Pass Filter S-series

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    • Protective Case

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  • Player One 2-Year Warranty