I actually went ahead and grabbed this pack - my 20D and 28-80mm lens fit comfortably in the pack WITH a full 2L bladder of water. I'll probably have to make some concessions on what else I carry with me (No extra jacket/layer?) but I can definately fit the essentials and my DSLR, although I'll have to fix the lens every time I take it out to shoot. Good call Angus

I disagree with Angus. Any hydration pack that has any water in it balloons and would make the outside pocket smaller...considerably. If you are just using it for storage and not using the bladder or hydration capability then go for it, but then it just becomes a bag. I might recommend the BD BBee pack or Bullet, or a larger Camelbak pack. Again, this pack is fine if you will use it only as a pack and not for hydration which is what it is intended for and equipped for. By the way, i have a Lobo, which is pretty much the same thing, and i have never been able to fit a DSLR body and one lens, much less two. At least not safely and securely.

I disagree. It's a 2-liter capacity, which is 2 Nalgenes. A body and lens are each smaller than a Nalgene, so you should be able to get them in just fine. Especially such a short lens. I doubt that you'll be able to store them attached, but they should fit.

I would say no. That front pocket would probably hold the body of a DSLR with no lenses at all. You are going to want 800-1000 cu. in. pack for what you want.