a_pla5tic_bagI was thinking of getting on of these to put in a patagonia bag I have but it would be kind of annoying to to have to take the whole ICU out any time I wanted something, especially if there's stuff on top of it. If I just needed transport I'd get one of those. But if I wanted a photo backpack that I may want to change lenses from or something, I'd probably get a dedicated bag. I'm near B&H so I guess I can just go look. F-stops look nice but are hella $$$. I've got an XT2, fuji 18-55, canon fd 300mm f/4 and 50mm f/1.8, and hoping to get a fuji 23mm f/2 WR soon.
Some of Patagonia's ski bags have back panel access