The ThinkTank Airport Essentials is rated to hold your standard DSLR, 4-6 basic zooms plus your iPad and 13" laptop. It's sized to handle your 300mm f/2.8 so if you're a nature or sports shooter, you're covered.Think Tank has designed this bag both for functionality and security since it comes with a security cable and lock that can be tied to a reception hall column or fence leaving you to remove your gear while the rest of the pack stays safely tethered. Even the strong YKK zippered sliders accept user-supplied locks for maximum protection and peace of mind while on the job. Inside, padded movable dividers allow you to arrange the guts of the bag in whatever way you choose. Your computers are stored in their own, separate lockable, zippered compartment. For even more flexibility and security, you can store your optional Artificial Intelligence Laptop case within the computer pocket.