ZWO 31mm Ha 7nm Unmounted Narrowband Filter

ZWO 31mm Ha 7nm Unmounted Narrowband Filter


In stock - Shipped 1-2 working days.

Model:  zwo_ha_31-7nm
Part Number:  ZWO-Ha7nmD31
Brand:  ZWO


ZWO 31mm Ha 7nm narrowband filter.

The ZWO H-Alpha filter  has a bandpass of  7nm and passes light at 656nm  wavelength, light transmission rate comes up to 80%. Best choice of narrowband H-alpha astrophotography filter for high-contrast imaging and revealing rich details of the nebula even in areas with strong light pollution, just prepare to experience the infinite fun with it!


  • FWHM:7±0.5nm
  • Thickness 1.9+/-0.03 mm  (1.25”/31mm/36mm)
  • Fine-optically polished to ensure accurate 1/4 wavefront  over the both surfaces
  • 80% transmission at H-alpha line 656nm (H-Alpha filter)

Transmission Curve

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