Dark-Sky Filter 77mm Slim 2-barrel this setup is easy to

this setup is easy to use and perfect for beginners and casual stargazers alike

Item Number FNDRILLUM Length 41

and portability

Eye Relief 14

Total width 1000 mm

Dark-Sky Filter 77mm Slim 2-barrel this setup is easy toUniversally applicable dark sky filter with 77mm filter thread for photo lenses. Particularly suitable for increasing contrast in aurora and deep sky photography. The wavelengths of 550nm (green) and 630nm (red), which are particularly relevant for aurora photography, are transmitted to more than 90%. A special feature of other so called CLS filters is that only the yellow light of the sodium line is effectively blocked at 590nmwill. This effectively