Here a lovely lil project someone has just posted on another group I
belong to. Check out this do-it-yourself'er, then go check out his
12 x 4.0 sec exposure of M16 
(there's a link in the page)
http://bi-staff.beckman.uiuc.edu/~me.../holmes32.html
Considering as he say's, it's the first CCD images off the scope and he is
yet to fully calibrate and colminate and setup the tracking properly. As it
is still in the testing stageI'm looking forward to seeing the finished results.
regards,CS
Rob