Hi All,
I thought I'd jump in with my 2 cents! I'm not going to argue Canon vs. Pentax, nor claim the Kx is the best camera to use for astro imaging. I just want to link to a few pictures I have taken with the Kx and let you decide for yourself. For me, the KX has been the easiest to use and has given me my best results, right out of the box, unmodified. As to the forced dark frame issue, it doesn't bother me. I usually observe through another scope while imaging anyway. The 10x live view makes focusing a breeze. I don't use a fancy intervelometer, as I had to with the Canons. I set the camera to ISO 12,800, exposure to 30 sec, and the shutter to HI multiple shots. I then put a rubber band around the shutter button, and go observe with my dob. I usually take about 50 exposures and stack in Registax. Here's a link to my images:
http://www.facebook.com/album.php?ai...9&l=585c569520
You decide if you like the results. If not, join the Canon groups.