Full Sun disk in H-alpha

Here's a full-disk image (not a mosaic) of the Sun on Saturday morning, April 19th, in the hydrogen alpha band (656.28 nanometers) with a double-stacked Lunt 60mm scope (bandwith <0.5 nm) and a 0.5x focal reducer. QHY-5M-II CMOS camera. Best 25% of 3100 frames stacked in Autostakkaert2, very slight wavelets in Registax 6, a few passes with the Photoshop unsharp mask function.

Larry Faltz