The Iris nebula taken from Kelling

[mickw]

The man who dies with the most toys wins 

[RobertM]

Sounds like I've got some catching up to do

Thanks for the good comments.

Mark, I'm not sure of the 4:1 ratio on hours but I can tell you that the M25 wipes the floor with the 450D.  It's not just about focal ratio and sensitivity but also because the s/n ratio on the camera is just so much better, I can pull more data out of images.