The manfrotto advanced tri backpack large will fit a pro dslr with battery grip an attached long range zoom lens plus 5 6 additional lenses a flashgun and accessories media card storage and space for a 15 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 s