ZWO 1.25" H-Alpha 7nm Narrowband Filter - Ha7nm125 30 mm Binoculars Triband RGB Ultra filter ensures

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

The S20 Stereo Microscope is light and easy to carry in the field making it well suited for hobbyists and students

A oversized center focus knob makes it easy to adjust focus

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

ZWO 1.25" H-Alpha 7nm Narrowband Filter - Ha7nm125 30 mm Binoculars Triband RGB Ultra filter ensuresThe 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