Baader's H-Alpha passfilter allows you to capture high-contrast images of H-II regions (ex: North American Nebula). With its medium 35 nm FWHM bandwidth, it is perfect for use in interline CCD cameras, such as SBIG ST-2000 / STL11000 due to their lower sensitivity. The sharp bandpass and > 90% high efficiency coatings make this Baader H-Alpha filter superior to other standard colored-glass based filters.
This H-Alpha filter shares the same awesome features as all the other Baader imaging filters. Equipped with unmatched optical quality and high efficiency hardened multicoatings, you'll receive the sharpest and highest contrast images possible with this H-alpha passfilter!