Optolong - Filtre L-Synergy Optolong coulant 50,8mm

The Skeyetek L-Synergy filter is a dual narrowband 7 nm filter designed for DSLR cameras, CMOS color sensors, and CCD cameras. It helps amateur astrophotographers capture detailed emission nebulae even in light-polluted areas.

• The description claims this filter reduces halos around bright stars.
• The description claims it isolates fine Ha and OIII emission lines while blocking most other wavelengths of unwanted light.
• The description claims it maximizes useful signal transmission and minimizes background noise due to light pollution.