SBIG ST10 E
L=10x2m 2xBin, R,G,B=4x2m 3xBin
Pollux 0.8m azimutal mounted telescope
3557mm (=140 inch) f/4.44
SBIG Filter Set provided with the CFW8
3-lens Wynne corrector
average of 2.6 arc seconds
MaximDL LRGB composit, PS 5.5, CCDSharp
extremly good transpareny and dark sky, medium seeing
Philipp Keller and Christian Fuchs

This is a nice group of galaxies in Leo, consisting of NGC 3993 (center), NGC 3987 (the edge on) and 3997 (upper left, irregular). NGC 3997 is especially interesting. It has a very faint irregular arm, maybe due to a collision with the smaller galaxy seen to the lower right of 3997. We have a contrast streched B&W picture below. The faint arm is only 15ADU above the background.