my astro-optics page my Coronado PST observations
wpo - sketching the Ha sun
The follow sketches, reproduced from the Brit Astr Assoc Memoir The Sun - 1928 -1950 publ.1952 via the spectrohelioscope, may serve as an aid to sketching the Ha solar phenomena via modern etelon filters.
images/pics [c] Brit Astr Assoc 1952/2005/[c] Maurice Gavin 2005visitors
