ZWO 36mm OIII 7nm Unmounted Narrowband Filter

ZWO 36mm OIII 7nm Unmounted Narrowband Filter


In stock - Shipped 1-2 working days.

Model:  zwo_oiii_36-7nm
Part Number:  ZWO-OIII7nmD36
Brand:  ZWO


ZWO 36mm OIII 7nm narrowband filter.

The ZWO narrowband O-III 7nm filter is designed for nebula observation allowing 7nm bandwidth of light centred on a wavelength of 500nm through,  which corresponds to OIII emission lines, blocking out all other light.  Adding the ZWO O-III Narrowband filter to your imaging collection will help you go beyond the RGB imaging and will help capture your favourite nebulas in a totally new light, no matter how polluted your skies may be!


  • 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 major OIII line 500nm (OIII filter)

Transmission Curve

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