R Lenses

R55-135mm f/3.5

  • Specifications
  • Block diagram
Marketed December 1963
Original Price 49,000 yen (w/case and hood)
Lens Construction (group) 10
Lens Construction (element) 15
No. of Diaphragm Blades
Minimum Aperture 22
Closest Focusing Distance (m) 2
Maximum Magnification (x)
Filter Diameter (mm) 58
Maximum Diameter x Length (mm) 69 x 140
Weight (g) 790

This is the first Canon zoom lens for 35mm SLR cameras. The optical system is constructed by 15 lens elements in 10 groups. Super Canomatic fully automatic diaphragm control mechanism is applied for aperture control. There are two aberration compensation systems for zoom lenses, an optical and a mechanical systems. This lens employs a mechanical system.

Block diagram