This image was captured through a Coronado P.S.T. (Personal Solar Telescope) with a 40mm @ aperature and a bandpass of <1.0A.

The h-alpha solar disk detail exhibited in this photo indicates the bandwidth is significantly less than 1.0A. I would estimate it at <0.7.


IMG_2171bwscript_du_filtered_osbe_gbu_u_12xtitle_sm6.jpg