Use the ProTactic Lens Exchange 200 AW from Lowepro to hold two lenses up to 70-200mm f/2.8. The dual-compartment design allows you to temporarily hold two lenses during an exchange, allowing you to change out a lens with one hand. An easy-grip main handle, attached to the zipper closure, allows for a smooth single-handed operation. Carry this bag via the removable, adjustable shoulder strap, or attach it to a ProTactic backpack or belt, thanks to the SlipLock-compatible design. Additionally, when the weather gets nasty, you can pull out the AW (All Weather) cover.