Hey All, I just purchased a Canon 30d with a 28-135 IS USM lens that i have been shooting with all day!! Anyway i bought it open box and i was just wondering if anyone had any advice for double-checking everything on the camera to make sure everything is working good. I've shot over a 100 pictures today and tested several things on the camera (flash, different settings, etc.) and everything seems fine but just looking for advice. Thanks in advance and look for more photos very soon!