Imaged last night, 20th June, using the 550d and Tamron 180mm Prime Macro.
1hr and 30min of exposure time all up. Shot at ISO800 at F5.6.
What a great lens.
I'm going to set the alarm for the AM and see if I can nab me M31 through it.
higher res image here
http://www.flickr.com/photos/astro_j...n/photostream/