The Telescope Authority
Since 1947

View Shopping Cart

Your Cart is Empty

Astronomik CLS Light Pollution Filter - 2" Mounted

SKU : AK-8H0054

- Read
  • Free Shipping

  • In Stock

Add to Wishlist

Got questions? Click for live chat

Product Details

  • The CLS Light Pollution Filter - 2-Inch Round Unmounted 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 486nm (H-beta)
    • 92-percent transmission at 496nm (OIII)
    • 92-percent transmission at 501nm (OIII)
    • 97-percent transmission at 656nm (H alpha)
    • Pass from 450 to 540nm and beyond 650nm

     

    Features:
    • Parfocal with other Astronomik filters
    • Glass thickness: 1mm
    • 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-2

     

  • specifications

    Filter TypeLight Pollution/City Light Suppression
    Free ShippingYes
    Peak Transmission97% at H alpha
    ShapeRound
    Size2"
    Warranty10 Year Warranty

Product Reviews

Customer Reviews
4.7 Based on 3 Reviews
5 ★
67% 
2
4 ★
33% 
1
3 ★
0% 
0
2 ★
0% 
0
1 ★
0% 
0
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
    A
    04/08/2022
    Anonymous
    United States United States

    Filter is awesome

    Works great for cutting out light pollution

    BI
    08/06/2007
    Brad i.

    Excellant LPR

    Seems this filter does it all. Great light pollution control. Brings out detail in everything you use it on from polluted skies. Enhances the views on nebulae, galaxies and clusters.Dims the background but not the image oes not dim the image

    TH
    05/08/2021
    Thomas H.
    United States United States

    Would recommend

    Delivery was fast and well packed shipping