Daystar

Based out of Warrensburg, Missouri, DayStar is a manufacturer of precision filters and optics designed for solar observing. DayStar hydrogen-alpha and Calcium K-line filters are rear-mounted etalon-based filtration systems, which allows for maximum resolution and detail with telescopes of any aperture.

The company was founded in 1973 and their precision filters have been used in amateur, university and flown space applications around the world.