Its shape is funny, you can store the minimum. Inside, I put a 7D with lens (not too big, 18-85), a 100 plus 50. No more ... I can replace one of the two objectives by my little fuji X20. Removable walls allow any stalling. The front pocket allows you to take with you the necessary for immediate cleaning, maps, papers, phone. Do not expect to much else. This really is to travel light. I bought it for skiing, it stalls is well on the front or back, the device is very easy to grasp. A small hike in the woods made me appreciate it also, but someone had to take my water bottle ...