IC 5146 Cocoon Nebula shot Aug 19+21, 2006 with DSI Pro II on
a C8NGT (8" Newtonian f5). All subframes were 80 sec L:R:G:B
in min)= 88:52:40:36. Captured with Envisage, calibrated and
sigma combined in Iris with other processing using PixInsight
and Photoshop CS. (I was dealing with the marine layer moving
in on both nights and had to cut short the green and blue
captures and this shows up as a bit more noise in those channels).