I hiked in Yosemite with my Lowe Pro Slingshot 302 with a Mamiya system. I carried 1 body, a 50mm, a 90mm, prism and a Giottos carbon fiber tripod with ball head. It killed my shoulder. If I knew better, I would have bought a full backpack. What was a saving grace of the bag was a hip strap that took some load off my shoulders. From my experience, get a backpack with hip straps. Lowe Pro makes excellent bags, but heavy loads don't work well with slingshot bags. I weighed the bag it it was 18 pound loaded.