ZWO Ha 31mm Unmounted Narrowband Filter


Hydrogen alpha filter for narrowband astrophotography.

  • 7nm bandpass suitable for most f/ ratios
  • 31mm unmounted filter for use in filter wheels or holders

Note: This item is a special order item. We do not hold stock in Mitcham and will order in to fulfil orders only. 

OUR PRICE $249.95

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    This filter is for use with narrowband astrophotography.

    Hydrogen alpha light has a wavelength of 656.3nm, and is the most commonly-used narrowband frequency. It can be used as part of two-band, three-band, or other false-colour images, as well as being combined as a luminance layer or as an addition to the red channel with full-colour filters.

    About ZWO Optical

    About ZWO Optical

    Established in 2011, ZWO Optical is a fast-growing global astroimaging camera powerhouse based in Suzhou, China. Known for its iconic ZWO ASI 120MM Monochrome CMOS Camera, the first-ever planetary CMOS camera to beat a CCD in the early 2010s, ZWO has  pioneered new astroimaging technology with revolutionary new features, including USB 3,0, cooled systems, ADC and more. Today, ZWO Cameras is known by every passionate astrophotographer and is available in over 25 countries world-wide. 

    Product Code: ZWO-Ha7nm2
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