Hi Alex, I'm so glad you stuck around mate!
Yes I was looking at a 400D today at Harvey Norman. I have no idea how it compares to a 30D.
I am not interested at all in normal daytime photography. I have cameras that will do for that. I just want a good astro-camera, and I'm sick of wasting my time and money on second best, or "near enough that'll do".
Baz.
