Unlike cheap astronomical filters for the amateurs, Asahi astronomical filters are definitely manufactured for professional astronomers to meet rigid specifications and environmental durability. Asahi is the first filter supplier for Sloan Digital Sky Survey and our filters are currently installed on telescopes in Hawaii, Chile, Canary, Arizona, South Africa, Australia or others. We are launching to develop large filter, which will be getting important for wide field telescopes. Visit our booth #132 in Marseille, France !

Astronomical Filter