Here is an extreme close up of the active region, AR 2708. I am very happy with the detail of the surface of the Sun that I have managed to capture here. The 10" telescope combined with the high quality Daystar Hydrogen Alpha filter makes for a very efficient system.
Telescope:
Camera:
Filter:
Stack:
Thomas Cooke 10" Refractor
Point Grey Chameleon3 USB3
Daystar University H alpha
33% of 1500 frames captured