Optolong City Light Suppression Telescope Filter

Description

Increased Contrast - The effects of light pollution are not eliminated, but suppressed, and the brightness of objects are not increased, but let through. The CLS (City Light Suppression) filter is designed to enhance the contrast and improve the visibility for both photographic and visual applications in artificial light polluted areas. The CLS filter reduces the transmission of light pollution wavelengths. Low optical density indicates high transmission. Filter substrate is fine-optically polished to 1/4 wave and <30 parallelism over both surfaces - Surface quality, according to MIL-O-13830, is 60/40This 2-inch CLS filter is made with thick Schott glass which has been multi-coated with ion-assisted deposition technology. This ensures scratch resistance and stability on the central wavelength (CWL). This CLS filter has a wider pass-band than the Ultra High Contrast (UHC) filters and is favored by many when observing in mild to moderate light pollution. Multiple layers of anti-reflection non-cementing coatings were applied via electron-beam gun evaporation with Ion-assisted deposition. Low optical density indicates high transmission. - Increased Contrast - The effects of light pollution are not eliminated, but suppressed, and the brightness of objects are not increased, but let through. - Multiple layers of. Do you have artificial light pollution where you set your telescope? The Schott B260 substrate material is from Germany.

Key Features

• Filter substrate is fine-optically polished to 1/4 wave and <30 parallelism over both surfaces - Surface quality, according to MIL-O-13830, is 60/40This 2-inch CLS filter is made with thick Schott glass which has been multi-coated with.
• The CLS (City Light Suppression) filter is designed to enhance the contrast and improve the visibility for both photographic and visual applications in artificial light polluted areas.
• The Optolong CLS, is a City Light Suppression Broadband Telescope Filter.
• The Schott B260 substrate material is from Germany. - Filters are either 2 mm thick on 1.25-inch, 2-inch, and 36 mm filters, or 1.0 mm thick on Clip series filters. - The filter mounting ring has been CNC machined from lightweight, strong.
• Resulting in a super thin 2-inch filter cell with a clear aperture of 45 mm.-This CLS filter is suitable for color CCD cameras, unmodified DSLR cameras, and visual viewing. - Included: -Each filter comes with a plastic case with high.
• Low optical density indicates high transmission. - Increased Contrast - The effects of light pollution are not eliminated, but suppressed, and the brightness of objects are not increased, but let through. - Multiple layers of.