Dark-Sky Filter 77mm Slim 2-barrel Designed with smooth focusing controls

Designed with smooth focusing controls and a stable

so you can be sure that you are receiving high-quality filters

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

and discovery in observers of all ages

Dark-Sky Filter 77mm Slim 2-barrel Designed with smooth focusing controlsUniversally 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