Using a unique harness system, the bag serves as a beltpack that can hang to the front, rear or side. A unique chest harness system keeps the bag firmly in place and also allows vertical adjustments in non-standing positions. A quick change of the configuration turns it into a functional shoulderbag. Cameras as large as the Nikon D200 and Canon 5D (without optional grips) and one large-aperture telephoto and wide-angle lens each will fit nicely into the main compartment.