Ricoh K system

Ricoh's 35mm SLR system based on the original Pentax K mount. The most advanced cameras of the system feature an electronically controlled shutter and aperture-priority auto exposure mode, while conventional models have a mechanical shutter and offer fully manual exposure mode. In order to implement shutter priority and program auto exposure modes, Ricoh had to modify the original mount and release a separate line of cameras and Rikenon P lenses.

• 35mm film SLR cameras with Pentax K mount (19):
  Ricoh XR-1 (1977) • Ricoh XR-2 (1977) • Ricoh XR500 (1978) • Ricoh XR-1S (1979) • Ricoh XR-2S (1979) • Ricoh KR-10SE (1980) • Ricoh XR5 (1980) • Ricoh KR-10 (1980) • Ricoh XR6 (1981) • Ricoh XR-S (1981) • Ricoh XR-2000 (1982) • Ricoh XR7 (1982) • Ricoh XR500 auto (1982) • Ricoh XR-F (1983) • Ricoh XR-10 (1986) • Ricoh XR-8 (1993) • Ricoh XR-8 Super (1994) • Ricoh XR Solar (1994) • Ricoh KR-5 SV (2000)