Comments about Tamrac Tamrac #5603 System 3 Compact Camera Bag for 35mm or Digital Cameras, Black.:

For it's bulk the bag is smaller inside than you might expect. Yet having said that, it holds my Pentak K10D quite comfortably, along with a full size flash unit and an extra telephoto lens. I also carry my Pentax battery charger and cables, and a few lens filters. I'm disappointed in the "mesh" pockets, in that they are really clear plastic with a mesh overlay. I see the plastic getting brittle over time. Plenty of pockets for SD cards, batteries, etc. Not enough room for my camera's user manual, though.

Well made bag, very sturdy, and weather resistant. Excellent buckling and zippers, comfortable strap. Highly recommend this bag as a day traveler. But if you need to carry more gear than I've described, I'd look into the System 6 bag.