I bought a Kata KT DL-3N1-33. The XF with back and Schneider 40-80mm fits the top compartment perfectly and are super easy to access. For the bottom compartment I found the included dividers pretty worthless. So I put two Photobackpacker lens cases in there. I've had these for years.
To keep it light, I don't usually carry all the lenses, though there's room for them. The Photobackpacker cases hold the pack in shape even when they are empty. I keep the stuff including lenses that I don't want to carry in the Phase One Pelican VA case
Unfortunately Photobackpacker has gone out of business.