The black soft canvas Retrospective Backpack 15L from Think Tank Photo has a 15L main compartment designed to hold a mirrorless or DSLR camera with a 70-200mm lens attached, plus four additional lenses, and a flash. The dividers in the main compartment can be reconfigured to accommodate different setups. All your camera equipment is accessible through the backpack's rear and top panels, and the dedicated laptop pocket will hold most 15" laptops. The 5-liter top compartment can be used to store personal articles and there is additional space in the front organizer pocket for your wallet, smartphone, or pens. The wide comfortable backpack straps have an adjustable sternum strap, and a removable webbing waist belt to take some of the weight off your shoulders.The exterior of the bag is equipped with accessory straps that are compatible with Think Tank's modular pouches. Collapsible water bottle pockets on each side of the bag hold a water bottle or a tripod, or the tripod can attach to the front panel. The canvas of the bag has been treated to repel water, and a rain cover is included for those days when there is a heavy downpour. Both top and rear panels close via its YKK zippers.