Hard Drive Disk wrote in post #13009985
I agree, I think a retrospective 10 would be too tight, 20 or 30 would be perfect.
The Retrospective 20 is 2.25" taller than the Retrospective 10. They are the same width and depth. As long as your lens or lens with camera mounted isn't taller than 9.5", the Retro 10 will be fine. The Retro 30 is the same height and depth as the 10, but it is 3" wider.
I just got a Retrospective 10 a few days ago. I took it to Fontainebleau State Park yesterday for some sunset shooting. There are two dividers inside which separate the main compartment into three columns.
I carried a 50D with Canon 17-55 f/2.8 attached in one column, a Sigma 10-20 and Sigma 30mm in the second column, and a Canon 70-200 f/4 in the third column. I put a remote release cable in one of the small inside side pockets. I had 2 B+W filters and Canon 20D body in the front pocket. I had a small flashlight, extra batteries, and extra CF cards in the outside side pockets. I have a Benro Travel Angel that folds to 13", and I can lay that across the top of the center compartment and close the flap over it. It's great as long as I'm only walking, but not secure enough for climbing on rocks like I did yesterday.
This is slightly different equipment that listed above, but I can fit all of this stuff inside: