No, I have several bags, but they mostly sit unused. I tend to keep lenses on cameras, not doing much switching. Most days I have a little cordura zippered case on my belt which is just big enough for a Weston Master V with Invercone. I have another bigger cordura case with strap that can hold an 85 or 90mm lens and maybe six rolls of film. I usually carry the Bessa L with the 15, an M2 or 3 with a 21 S.A., another with either the 85/2 Nikkor or 90/2.8 Elmarit, and an M2 with a 35/2 Summicron. I rarely carry a 135 or longer lens. Mostly the cameras are just on straps, not inside any bag. I also carry film in my pockets. On occasion I bring my original mid-1970's vintage tan canvas Leitz shoulder bag.