If starts with '1' have cameras have the 100 frame. Cameras whose serial number starts with a '0' 'have the 135 frame line. It is the first 6x4.5 rangefinder camera to offer interchangeable lenses - all with highly accurate electronic shutters. It combines the classic handling of manually operated features with highly sophisticated electronics for an optimum balance of superior image quality, ease of operation and maximum user control. It is a Medium Format Interchangeable Lens Rangefinder camera with a format of 6 x 4.5cm that offers accurate, high fidelity image quality. The Bronica 645 RF : a new camera system from Tamron-Bronica introduced in 2000.
