This bag has two zippers for it's large compartment; one opens like a traditional pack, on the opposite side of the shoulder straps, and one opens on the same side as the shoulder straps. For me, what sounded like a good idea (keep shoulder straps off ground) wound up being confusing and my camera stuff was not all that accessible anyway. Also, with the photo pack attached, there is little room for anything else inside. Had I been able to test drive it retail, I would have bought a fanny pack (accessibility) just for camera and lenses. Construction & quality is good, & I DO like the photo block for home storage, so I will keep the set and try to use the pack elsewhere.