ZWO NARROWBAND H-ALPHA FILTER 7 NM - 31 MM UNMOUNTED
The narrowband nebula filter from ZWO clearly increses the contrast of the object. The filter reduces the effect of light pollution considerably.
- Transmission more than 80% at 656 nm (H-alpha line)
- The filter has 31 mm diameter (round) and is not mounted
- FWHM 7 nm (narrow band)
- Main field of application: photography of dim nebulae