The Baader 2" narrowband (6.5 nm) filter set is a premium choice for astrophotographers who want to capture the highest-contrast images, optimised for CMOS but also excellent with CCD cameras, at the H-alpha, H-beta, Oxygen III or S-II wavelengths. The filters offer excellent transmission within the selected wavelength range while completely blocking light at other, unwanted wavelengths. They guarantee outstanding results with telescopes featuring focal ratios from f/10 to f/3.5.
The filters’ high-quality glass and precision workmanship promise excellent contrast and image sharpness. Their coatings are applied to the glass using state-of-the-art equipment, ensuring the ideal transmission range. Anti-reflection coatings contribute to outstanding image quality, while the surfaces are also treated to make the glass scratch-resistant.