Optolong Clear Sky Clip Filter for M77 and M82 Threads

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About this product

Optolong Clear Sky Clip Filter for M77 and M82 Threads

The Optolong Clear Sky filter effectively blocks out the influence of city Na lamp and Hg mercury lamps. It not only improves contrast, but can enhance the star colours and is ideal for shooting the Milky Way.

Suitable for light pollution environments or Bortle scale levelc1 to level 4.

It can also shoot city night scenes. 

Available as

• M77 Mounted
• M82 Mounted

Coating Technology

• Multi-layers anti-reflection coating
• Non-cementing optical substrate coating
• Optolong L-Pro 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.
• Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.

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