Mamiya-Sekor C 300mm F/5.6

Medium telephoto prime lens • Film era • Discontinued

  • Announced:
  • · 1976
  • Production status:
  • ● Discontinued
  • Country of design:
  • · Japan
  • Original name:
  • · MAMIYA-SEKOR C 1:5.6 f=300mm
  • Class:
  • · Slow 6x4.5 medium-format medium telephoto 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 (2)

■Mamiya-Sekor C 300mm F/5.6A6 - 54.00m⌀58 1976 ●
■Mamiya-Sekor C 300mm F/5.6 ULD NA6 - 54.00m⌀58 ●

Specification

Optical design:
Medium format 6x4.5
300mm
F/5.6
6 elements in 5 groups
Mamiya M645 [63mm]
13.3°
Diaphragm mechanism:
Diaphragm type:
Automatic
Aperture control:
Aperture ring (Manual settings only)
9 (nine)
Focusing:
4m
<No data>
Focusing modes:
Manual focus only
Manual focus control:
Focusing ring
Physical characteristics:
710g
⌀70×164mm
Accessories:
Screw-type 58mm
Built-in telescopic round
Mamiya M645 Teleconverter 2X N → 600mm F/11.2

Sources of data

  • Mamiya-Sekor C interchangeable lenses for Mamiya M645 instructions.
  • Mamiya-Sekor C interchangeable lenses for Mamiya M645 Super/ M645 instructions.
  • Mamiya-Sekor C interchangeable lenses for Mamiya M645 instructions (II).
  • Mamiya M645 booklet (1982).
  • Mamiya M645 booklet (1981).
  • Mamiya M645 instructions (II).
  • Mamiya M645 instructions.
  • Mamiya M645 1000S booklet.
  • Mamiya M645 1000S instructions.
  • Mamiya M645J instructions.
  • Mamiya M645J instructions (II).

Other medium telephoto prime lenses in the Mamiya M645 system

■Mamiya M645 mount (2)
Mamiya-Sekor C 300mm F/5.6 ULD NA6 - 54.00m⌀58 ●
Mamiya A 300mm F/2.8 APOA9 - 83.50m-- 1992 ●

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