I have the Slingshot AW200 and find it is a very good match for the equipment you have. I seem to have very similar lenses for comparison! I can hold the 40D with 17-55 and hood, or the 70-200f4 mounted (without hood). The 70-200 fits, but is pretty snug. I use the battery grip on the 40D in both cases. The 70-200 fits nicely in one of the two internal compartment, as does a 580EX flash. I can also fit a 24-105 with hood (not reversed) mounted to the 40D with grip.


In total I can get: Canon 40D, grip plus 24-105, 70-200 f/4, 60mm Macro lens, 1.4x extender, and 580Ex flash, plus chargers, off camera flash cable, G10and some filters. Typically I have some of that left at home, but what I love is that I CAN take it all if needed for a trip somewhere.


I like the fact that it sits in the middle of your back if you choose, or slung over the shoulder for easy access. I has a little clip to hold it in place on your back...


It does look more like a camera bag, but then Crumpler seems to indicate 'more money inside' if someone knows what they are looking at