For those interested in a Canon 40D here's a link to a video review.
It touches on the camera's features and also a separate video for connecting the camera for astrophotography.
It's a great site for info on most camera brands.....Have a browse
Just click on the Canon EOS 40D Video Tour selection at top of page
http://www.cameralabs.com/reviews/Ca...o_review.shtml
D & B