Baader Filters H-alpha CMOS f/3 Ultra-Highspeed 31mm (75571)

H-alpha filters transmit light at a wavelength of 656nm, making them the top choice for narrowband astrophotography. They excel in providing high-contrast imaging and revealing rich details of nebulae, even in areas with strong light pollution.

Specifications:

    Central Wavelength (nm): 656.3
    Half-Value Width (nm): 3.5
    Frame Type: Ring
    Coating: Reflex-Blocker™
    Filter Thickness (mm): 2
    Filter Size (mm): 31

Compatibility and Applications:

    Appropriate for f/ratio: f/3.4 - f/2.3
    Type: Line filter
    Series: f/3 Ultra-Highspeed

Applications:

    Useful for photographs: Yes
    Visually useful: No
    Nebulae & Galaxies: Yes
    Moon & Planets: No

These H-alpha filters are indispensable for astrophotographers looking to capture high-contrast, detailed images of nebulae while reducing interference from light pollution.