Hi All, I've been wanting to try some wide field images of the milky way etc but never really bothered since my Canon PowerShot S5IS has an exposure limit of 15 seconds.
However, tonight I finally got around to play with CHDK which is a great utility to enhance the capabilities of your Canon camera (See
http://chdk.wikia.com/wiki/CHDK for details)
Then I mounted the cam on top of my scope for tracking. I managed to do a quick stack of 4 frames of M42 (didn't have time for more)
Each frame was a 1 minute exposure at ISO 200 in manual mode.
For such a simple setup, and with only 4 frames, I definitely think the result is quite promising
I will have to try more of this some time soon.