The Astronomik CLS is an excellent filter for black & 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.
Astronomik CLS Light Pollution Filter - 2" Round Unmounted
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% transmission at 486nm (H-beta)
- 92% transmission at 496nm (OIII)
- 92% transmission at 501nm (OIII)
- 97% transmission at 656nm (H alpha)
- Pass from 450 to 540nm and beyond 650nm
- 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
- Additional Information
SKU AK-CLS-2 Manufacturer Astronomik Type of Filter Light Pollution Reduction Filter Usage Imaging, Visual Single or Set? Single Filter Filter Size 2" Filter Shape Round Filter Mounted? Mounted Warranty 10 Year Warranty Peak Transmission 97% at H-alpha
Customer Reviews 1 item(s)
- 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
1= Houston, We Have a Problem & 5= It's Out of This World
- Included Items
- Astronomik CLS Light Pollution Filter - 2" Mounted
- Plastic Case
- Questions & Answers
Product QuestionsHow does this filter differ from the Astronomik CLS CCD Light Pollution Filter (Item # AK-CLSCCD-2)?Question by: Chris on Jun 22, 2016 9:01:00 PMThe main difference is that the basic CLS filter does not block IR wavelengths, while the CLSCCD does. The CLSCCD also has higher maximum transmission (~98-99% vs ~92-95%) of key wavelengths as well as steeper cutoffs to reject light pollution a bit more effectively than the standard CLS.Answer by: Chris Hendren (Admin) on Jun 23, 2016 11:37:00 AM
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