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SKU : AK-8H00FI
Product Details
The 31mm CLS Light Pollution Filter - Mounted in Low Profile Non-Threaded Cell by Astronomik:
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.
Now Mounted in Low Profile Non-Threaded Cell: Sometimes unmounted CCD filters can be hard to handle. The smaller diameters, such as this 31mm CLS filter, can be especially difficult to pick up and insert or remove from the filter wheel, and that can lead to possible damage as well as unwanted reflections from incorrectly installed filters. Astronomik has solved this problem by mounting their 31mm and 36mm filters in a low profile (3mm) non-threaded cell. O-rings, washers, or spacers are no longer required to hold the filter in place, and because the cell is only 3mm thick, it works well in all appropriately sized filter wheels. Mounted 31mm and 36mm Astronomik filters will also play nice with unmounted versions in the same carousel.
Astronomik CLS Light Pollution Filter - Transmission Information:
Features:
OPT Product Number: AK-CLS-31
specifications
| Filter Type | Light Pollution/City Light Suppression |
| Free Shipping | Yes |
| Peak Transmission | 97% at H alpha |
| Shape | Round |
| Size | 31mm |
| Warranty | 10 Year Warranty |
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The filters probes to be a photo saver!! I do live in mid downtown and adding it to the ccd makes the sky available again to photography. regards Hernan
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