The manfrotto advanced tri backpack medium will fit your pro dslr with battery grip attached mid range zoom lens plus 3 4 additional lenses flash and accessories media card storage and space for an 116 laptop or tablet the advanced tri backpack offers 3 ways to store carry and use your gear thanks to its innovative design the tri backpack can be worn as a backpack sling bag or x position in the backpack or x position with the straps across your chest you can easily and quickly sw