ZWO Ha 31mm Unmounted Narrowband Filter

OUR PRICE $239.95

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    The ZWO H-alpha (Hydrogen filters) 7nm, 31mm is best suited for the ZWO 8 position Filterwheel - 31mm. These narrowband filters are ideal to help with the contrast between the night sky and the nebula. They are not used to remove the light pollution effects or increase brightness.

    This ZWO H-alpha filter passes light at a wavelength of 656nm and has a 7nm bandpass. Also, this filter allows light transmission up to 80%.


    • FWHM:7±0.5nm
    • Glass Thickness: 2.0+/-0.03 mm  
    • Optics are polished over the surfaces in order to achieve 1/4 wavefront
    • Ensures 80% light transmission
    • Infrared wavelength is 700-1100nm cut-off
    • <0.1% transmission of off-band.


    About ZWO Optical: Astrophotography has never been easier

    Established in 2011, ZWO Optical is a fast-growing global astroimaging camera powerhouse based in Suzhou China.
    They focus on building and innovating groundbreaking CMOS cameras such as the iconic ZWO ASI120MM Monochrome CMOS camera (the first-ever planetary CMOS camera to beat a CCD in the early 2010s).
    ZWO continues to pioneer new astrophotography technology with revolutionary features to capture exceptional quality of images of space that will last you a lifetime.

    Today, ZWO cameras are recognised by every passionate astrophotographer and are available in over 25 countries internationally. 


    Product Code: ZWO-Ha7nmD31

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