ZWO 36mm Ha SII OIII 7nm Unmounted Filter Set (ZWO-NB7NMD36) Ethos 9") without included eyepiece attached\

9") without included eyepiece attached\

Compare with the moon & Skyglow filter before the naked eye

and reducing the transmission of certain wavelengths of light

About coating: the interference filter will show different colours under different light

54 kg) Slew Speeds: 9 slew speeds - max speed 3°/second Tracking Rates: Sidereal

ZWO 36mm Ha SII OIII 7nm Unmounted Filter Set (ZWO-NB7NMD36) Ethos 9") without included eyepiece attached\Narrowband filter do not eliminate the effects of light pollution or increase the objects brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula. 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