Filtre hydrogène alpha 7nm, Ø31mm

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