Baader Filters H-alpha CMOS f/2 Ultra-Highspeed 31mm (70929)

H-alpha filters are designed to transmit light at a wavelength of 656nm, making them the top choice for narrowband H-alpha astrophotography. They provide high-contrast imaging and reveal intricate details of nebulae, even in areas with significant light pollution.

Specifications:

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

Compatibility and Applications:

    Appropriate for f/ratio: f/3.4 - f/1.8
    Type: Line filter
    Series: f/2 Ultra-Highspeed

Applications:

    Useful for photographs: Yes
    Visually useful: No
    Twin stars, Moon & Planets: Not suitable
    Nebulae & Galaxies: Ideal

These H-alpha filters are essential for astrophotographers seeking to isolate specific hydrogen emissions and produce high-contrast, detailed images of nebulae while reducing interference from light pollution.