A medium format 6x7cm film SLR system that offered high quality performance, handling convenience and versatility required for professional photography. It consisted of 3 models of the RB67 series:
The RB67 series cameras were developed as complete modular system cameras, with a very high degree of interchangeability in lenses, finders, focusing screens, film holders and backs, plus a full range of other valuable accessories which permitted their use in many other day-to-day assignments. The cameras became an instant success that lasted for decades to a world-wide status as the "workhorse of the pros".
A wide range of lenses from the 37mm fisheye to the 500mm medium telephoto were available in the system, including special application lenses for Variable Soft Focus, PC shift, Variable Flat Field Macro, Zoom, and an exceptional series of K/L APO telephotos. The lens designs incorporated a Seiko #1 between-lens shutter, with the control mechanism in the main camera body, which also provided full flash synchronization at all shutter speeds up to 1/400 sec.
The lenses for the RB67 system can be divided into five series:
Design emphasis was placed on high resolving power and excellent color balance justifying the 6x7cm format. A multi-coating process made the Mamiya-Sekor lenses among the sharpest in the world. It eliminated reflection over a wide range of frequencies, making images clearer and tones crystal clear. In color work this was especially valuable as color rendition was vastly improved.
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