Bronica RF645 was a world's first medium format 6x4.5 rangefinder camera to feature interchangeable lenses. It came with a superb lineup of lenses to take full advantage of the rangefinder camera. The Bronica RF645 also achieved a new dimension in compactness and light weight.
High-performance Zenzanon-RF lenses combined the precision detail and vividness with a compact design. Symmetrical optical configuration maintained image quality with superior aberration compensation. Each lens featured fully electronic shutter unit. Its operations including shutter blade action, diaphragm movement and shutter recharge were all electronically controlled by an actuator inside the unit.