R Lenses

R58mm f/1.2

  • Specifications
  • Block diagram
Marketed February 1962
Original Price 39,000 yen
Lens Construction (group) 5
Lens Construction (element) 7
No. of Diaphragm Blades 8
Minimum Aperture 16
Closest Focusing Distance (m) 0.6
Maximum Magnification (x)
Filter Diameter (mm) 58
Maximum Diameter x Length (mm) 64.5 x 52.8
Weight (g) 432

A standard lens for 35mm SLR cameras with the largest aperture in the world when marketed. The Super Canomatic fully automatic diaphragm control mechanism is used in this lens, although it requires aperture preset. This is a Gauss type lens with seven elements in five groups. It was introduced slightly before the Canonflex RM, the last model of R series SLR, was marketed in April, 1962.

Block diagram