Astronomik - CLS Light Pollution Filter - 2" Round Mounted

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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.

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