I am looking to downsize my shoulder bags to one that will just hold the essentials: a wide zoom, a mid-zoom, and a heavy 80-200mm Nikon AP-S tele-zoom. Room for a prime as well would be nice, but not essential. Easy in a backpack, right? But so far I haven't run across a smallish shoulder bag that could handle this outfit. Can anybody help with a lead on one? I would be grateful.