Mamiya-Sekor C 55mm F/2.8

Wide-angle prime lens • Film era • Discontinued

  • Announced:
  • · 1975
  • Production status:
  • ● Discontinued
  • Country of design:
  • · Japan
  • Original name:
  • · MAMIYA-SEKOR C 1:2.8 f=55mm
  • Class:
  • · Fast 6x4.5 medium-format wide-angle prime lens
  • · Professional model (Top class)
  • System:
  • · Mamiya M645 (1975)

Abbreviations

C Multi-layer anti-reflection coating is applied to the surfaces of lens elements. This anti-reflection coating increases light transmission, eliminates flare and ghosting, and maintains color consistence among all lens models.

Model history (4)

■Mamiya-Sekor C 55mm F/2.8A9 - 60.55m⌀58 1975 ●
■Mamiya-Sekor C 55mm F/2.8 SA8 - 60.45m⌀58 1981 ●
■Mamiya-Sekor C 55mm F/2.8 NA8 - 60.45m⌀58 ●
■Mamiya 645 AF 55mm F/2.8A7 - 60.45m⌀58 2000 ●

Specification

Optical design:
Medium format 6x4.5
55mm
F/2.8
9 elements in 6 groups
Mamiya M645 [63mm]
64.8°
Diaphragm mechanism:
Diaphragm type:
Automatic
Aperture control:
Aperture ring (Manual settings only)
6 (six)
Focusing:
0.55m
<No data>
Focusing modes:
Manual focus only
Manual focus control:
Focusing ring
Physical characteristics:
395g
⌀70×71mm
Accessories:
Screw-type 58mm
Screw-type round
Not compatible

Sources of data

  • Mamiya-Sekor C interchangeable lenses instructions.
  • Mamiya-Sekor C interchangeable lenses for Mamiya M645 instructions (II).
  • Mamiya M645 instructions.
  • Mamiya M645 1000S booklet.
  • Mamiya M645J instructions.

Other wide-angle prime lenses in the Mamiya M645 system

■Mamiya M645 mount (6)
Mamiya-Sekor C 45mm F/2.8 NA9 - 70.45m⌀67 ●
Mamiya-Sekor C 45mm F/2.8A9 - 70.50m⌀77 1975 ●
Mamiya-Sekor C 45mm F/2.8 SA9 - 70.45m⌀67 1981 ●
Mamiya-Sekor C 55mm F/2.8 NA8 - 60.45m⌀58 ●
Mamiya-Sekor C 55mm F/2.8 SA8 - 60.45m⌀58 1981 ●
Mamiya A 55mm F/2.8 N/LA8 - 60.45m⌀67 1992 ●

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