M31 Andromeda Galaxy

Taken early this morning directly overhead with my DIY barndoor mount and a 200mm lens at f4.
I just love looking at this galaxy. I commented on Facebook that light can travel 7.5 times around the equator in 1 second but the light from this galaxy has taken 2.5 million years to reach my camera. and that's a relatively close galaxy.

This shot would be almost impossible using my Meade etx 105 due to its position in the sky but using my barndoor mount its easy and much quicker to set up. Its also too big to fit on the sensor at that magnification.
Using 45 second raw images at iso 1600 from my 40d. I took 25 lights, 22 darks, and 21 flats all processed in Deep Sky Stacker. That's 18 minutes of data. I would like to try this shot in a dark windless location using much longer exposures. Maybe soon?