Specialized "H-alpha" solar telescope safely reveals dramatic prominences, flares, filaments, granularity, plages, and other solar phenomena The Meade/Coronado PST is the most affordable hydrogen-alpha solar telescope on the market Internal etalon filter transmits only hydrogen-alpha light (656.3nm), with a bandpass of <1.0 Angstorm for great solar views Internal blocking filters reject all unwanted and harmful radiation, for completely safe viewing Weighs only 3 lbs., so requires only a small telescope mount or sturdy camera tripod for support