My latest image, M45, shot at 200mm (Sigma 55-200, f/5.6) with my EOS400D mounted on my EQ6, exposure times were 20s, 1min, 5min, 10min, 20min:
And this is an older image I made in March or May this year, NGC7000 with the same cam, but a 19€ lens (135mm, f3,5, Berolina-Westanar):
And this is a 24h timelapse I made when the Eyjafjallajökull erupted, 24h of no planes, the only other Objects were the ISS and a Spaceshuttle.
Video:
[ame="http://www.youtube.com/watch?v=2JO_OVYG-eE"]YouTube - 24h Timelapse - 100 Fps Version[/ame]
Still image: