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Astronomik CLS Light Pollution Filter - 1.25" Mounted

SKU : AK-CLS-1

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Product Details

  • The CLS Light Pollution Filter - size 1.25-Inch,  Round by Astronomik:

    The Astronomik CLS is an excellent filter for black and white and color imaging of nebulae, galaxies and star clusters with astronomical instruments of any size. By blocking the spectral lines of mercury and sodium-vapor lamps, and letting the largest part of the visible light and H-alpha emissions pass, the CLS filter will effectively block out most surrounding light pollution, eliminating that annoying orange glare.

    The filters are optimized for use with filter to aperture ratios of 1:3 to 1:15. By remaining within these aperture ratios, aberration and comma are eliminated.

     

    Astronomik CLS Light Pollution Filter - Transmission Information:

    • 92-percent transmission at 486 nm (H-beta)
    • 92-percent transmission at 496 nm (OIII)
    • 92-percent transmission at 501 nm (OIII)
    • 97-percent transmission at 656 nm (H-alpha)
    • Pass from 450 to 540 nm and beyond 650 nm

     

    Features:
    • Parfocal with other Astronomik filters
    • Glass thickness: 1 mm
    • Highly resistant against high humidity, scratches and aging effects
    • Diffraction limited, the filter will not reduce the optical performance of your telescope!
    • Astronomik filters are delivered in a high-quality, long lasting, filter box

     

    OPT Product Number: AK-CLS-1 

     

  • specifications

    Filter TypeLight Pollution/City Light Suppression
    Free ShippingYes
    Peak Transmission97% at H alpha
    ShapeRound
    Warranty10 Year Warranty

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5.0 Based on 2 Reviews
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Filter Reviews:
    MC
    04/29/2020
    Marcelo C.
    United States United States
    Great filter

    This filter has excellent transmission on the wavelengths that are needed for Astro Photography and good light pollution suppression. I’ve been able to imaging galaxies with relatively low exposure time in bortle 8 sky

    GR
    04/16/2019
    Gilbert R.
    United States
    visual filters

    wanting to see DSO's better. The people at OPT were helpful in explaining the difference and use of visual and imaging filters. service was prompt.