ZWO 1.25" H-Alpha 7nm Narrowband Filter - Ha7nm125 30 mm Binoculars at at least 2 points

at at least 2 points to maintain the system's rigidity

It is lightweight (3

high contrast images that are virtually free of optical defects such as chromatic aberration (color fringing)

The body itself is small and lightweight

Triband RGB Ultra filter ensures the high transmittance of the HSO emission line and can be used for observing deep-sky objects with large-diameter telescopes

ZWO 1.25" H-Alpha 7nm Narrowband Filter - Ha7nm125 30 mm Binoculars at at least 2 pointsThe ZWO H Alpha filter has a bandpass of 7nm and passes light at the 656nm wavelength, with a light transmission rate of up to 80%. This is the best choice for a narrowband H alpha astrophotography filter if you are doing high contrast imaging and want to reveal rich details of the nebula even in areas with strong light pollution. This rendition of the ZWO Ha 7nm Filter is housed in a 1. 25" threaded metal cell and can be used in 1. 25" filter wheels