A filament filled sun, recorded through a Lunt LS152 solar telescope with 90mm Coronado Solarmax affixed to front, narrowing the bandpass to approximately .5 angstrom. You can see a comparison of the contrast with and without the Solarmax 90 here.
More recent sun images can be found here.
May 26, 2013/ captured with Lunt LS152 solar telescope, courtesy Dennis Zywiczynski, Coronado Solarmax90 and PGR Grasshopper Express 6 megapixel camera
© Alan Friedman | all rights reserved