M33, Spiral Galaxy type Sc, in Triangulum. Taken Oct. 16 & 17, 2006 with a DSI Pro II and Outback
Cooler with a C80ED operating at f6 and a WO 0.8x field flattener/reducer. L subframes were 90
seconds, the RGB subframes were 60 seconds, and the H-alpha subframes were 240 seconds resulting in
the following total exposures L:Ha+R:G:B (min) = 102:88+44:53:50. Captured with Envisage, calibrated
and sigma combined in Iris with other processing using PixInsight LE and Photoshop CS. North is up.