Optolong Clear Sky Light Pollution Reduction Screw-On Filter - 77mm Camera Thread
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Original manufacturer description below. Improved description coming soon.
Optolong Clear Sky Filter is a light pollution filter that suppresses light pollution to improve contrast of the Milky Way. Working in Bortle 2-3 levels with natural color.
1. Optolong Clear Sky Filter Introduction
- A screw on filter with the easiest installation like a UV filter
- 77mm photo filter thread for use on camera lenses that can accept this filter size. 82mm filter also available (sold separately)
- Supress light pollution to make the night sky clear
- Enhance the contrast of images
- To bring up the colors, fascinating experience
2. Coating Technology
- Multi-layered anti-reflection coating
- Non-cementing optical substrate coating
- Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL (central wavelength) no deviation affected by temperature change.
- Rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.
Other Information
- Country of Manufacture: China
Original manufacturer description below. Improved description coming soon.
Optolong Clear Sky Filter is a light pollution filter that suppresses light pollution to improve contrast of the Milky Way. Working in Bortle 2-3 levels with natural color.
1. Optolong Clear Sky Filter Introduction
- A screw on filter with the easiest installation like a UV filter
- 77mm photo filter thread for use on camera lenses that can accept this filter size. 82mm filter also available (sold separately)
- Supress light pollution to make the night sky clear
- Enhance the contrast of images
- To bring up the colors, fascinating experience
2. Coating Technology
- Multi-layered anti-reflection coating
- Non-cementing optical substrate coating
- Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL (central wavelength) no deviation affected by temperature change.
- Rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.
Original manufacturer description below. Improved description coming soon.
Optolong Clear Sky Filter is a light pollution filter that suppresses light pollution to improve contrast of the Milky Way. Working in Bortle 2-3 levels with natural color.
1. Optolong Clear Sky Filter Introduction
- A screw on filter with the easiest installation like a UV filter
- 77mm photo filter thread for use on camera lenses that can accept this filter size. 82mm filter also available (sold separately)
- Supress light pollution to make the night sky clear
- Enhance the contrast of images
- To bring up the colors, fascinating experience
2. Coating Technology
- Multi-layered anti-reflection coating
- Non-cementing optical substrate coating
- Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL (central wavelength) no deviation affected by temperature change.
- Rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.
Other Information
- Country of Manufacture: China
Optolong Clear Sky Light Pollution Reduction Screw-On Filter - 77mm Camera Thread