20120318 M41 and M42

The transparency is good and thus I did some imaging from inside my home.  Due to the serious light pollution, I'm using 20s exposure at f/2.8 with 200mm focal length.  I'm shooting M42 first (222 shots taken) and when it sinks too low, I turn to M41 then (95 shots taken).

I believe that I should use a better flat-field.