I bought this backpack after doing a lot of research online. I was using a full sized backpack from another company comparable in size and found that getting all my gear organized was much more of a challenge than I had hoped. I got my hex backpack in the mail and immediately started transferring all my gear doing very minimal modifications to the dividers. I found that it was much easier to organize and everything seemed to have a place, no doubt by design. I was able to fit my a7riii with mounted 24 to 105, 3 speed flashes, flash controller, 90mm macro, 35mm 1.4, 85mm 1.8, 16 to 35 f4, 70 to 200 f2.8, full cleaning kit, and all my straps.. thats just in the main compartment. I love the design and can't wait to use it for my everyday carry. Thanks Hex. Awesome gear!!