The Baader 2" Narrowband (6.5nm) H-alpha Filter is an excellent choice for astrophotographers who wish to capture the highest contrast images optimized for CMOS, while also delivering outstanding results on CCD at the H-alpha wavelength. The filters exhibit excellent light transmission properties in the H-alpha wavelength range, while completely "cutting off" light at other "unwanted" wavelengths. They guarantee excellent results when used with telescopes having a focal ratio of f/10 - f/3.5.
The filters' superior glass material and craftsmanship promise excellent contrast and image sharpness. The coatings are applied to the glass using the most advanced equipment, ensuring the ideal transmission range. The anti-reflective coatings contribute to excellent image formation, and additionally, the surfaces have been treated to make the glass material scratch-resistant.
Not suitable for solar observation!