Mamiya-Sekor C 50mm F/4 Shift

Shift lens • Film era • Discontinued

  • Announced:
  • · No data
  • Production status:
  • ● Discontinued
  • Country of design:
  • · Japan
  • Original name:
  • · MAMIYA-SEKOR SHIFT C 1:4 f=50mm
  • Class:
  • · Slow 6x4.5 medium-format shift 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.
SHIFT Perspective Control.

Specification

Optical design:
Medium format 6x4.5
50mm
F/4
10 elements in 8 groups
Mamiya M645 [63mm]
69.8°
Diaphragm mechanism:
Diaphragm type:
Manual
Aperture control:
Aperture ring
6 (six)
Focusing:
0.45m
1:5.56
Focusing modes:
Manual focus only
Manual focus control:
Focusing ring
Perspective control mechanism:
Shift range:
-16..0..16mm
Tilt range:
<No data>
Yes
<No data>
Physical characteristics:
705g
⌀80×105.5mm
Accessories:
Screw-type 77mm
Not required
Mamiya M645 Teleconverter 2X N → 100mm F/8

Sources of data

  • Manufacturer's technical data.
  • Mamiya-Sekor C interchangeable lenses for Mamiya M645 instructions.
  • Mamiya-Sekor C interchangeable lenses for Mamiya M645 Super/ M645 instructions.
  • Mamiya interchangeable lenses for Mamiya 645 instructions.
  • Mamiya interchangeable lenses for Mamiya 645 instructions (II).
  • Mamiya M645 instructions (II).
  • Mamiya M645 1000S instructions.
  • Mamiya M645 Super booklet.
  • Mamiya 645 Pro booklet.
  • Mamiya 645 Pro-TL booklet.
  • Mamiya 645E booklet.
  • Mamiya medium format cameras booklet.
  • Mamiya medium format cameras booklet (PUB. 9012).
  • Mamiya medium format cameras booklet (PUB. 9022).

Manufacturer description #1

The 50mm f/4 Shift is a special application lens for perspective control. It features a unique wide field coverage and perspective control shift mechanism in rotating mount, allowing the photographer to maintain proper linear perspective, identical to PC shift lenses for 35mm cameras. Applications include precise perspective for architectural or industrial rendering or table top photography.

Manufacturer description #2

When the Shift Control Knob is rotated, the lens itself moves parallel to the film plane. Additionally, the lens can be rotated 360 degrees, and has click-stops at 30-degree intervals (the lens can also be used between click-stops).

Since the negative area of the M645 is a rectangle (41.5x56mm), the extent to which the lens can be shifted will change each time the lens is rotated. When the Central Index Mark of the lens (located beneath the Shift Limit Window) is uppermost or lowermost, the lens will move horizontally, with a maximum shift of 13mm. The maximum shift possible at each 30-degree click-stop is indicated by a color-coded numeral appearing in the Shift Limit Window. This numeral indicates the maximum shift in millimeters, and its color matches that of its position on the Shift Scale. To avoid vignetting, the appropriate color on the Shift Scale shoul not be moved beyond the Shift Index.

When the lens is rotated 90 degrees, it can be shifted upward or downward (vertically), with a maximum shift of 16mm. When the lens is rotated for a diagonal shift, it can be shifted up to the limit indicated in the Shift Limit Window.

Other shift lenses in the Mamiya M645 system

■Mamiya M645 mount (2)
Phase One 45mm F/3.5 TSM8 - 70.38m⌀82 2008 ●
Schneider-Kreuznach PC-TS APO-Digitar 120mm F/5.6 HM AsphericP6 - 40.84m⌀95 2010 ●

Lenses with similar focal length

■Mamiya M645 mount (3)
Hartblei Super-Rotator 45mm F/3.5 TS-PC MC
akaWiese Technoplan-T3 45mm F/3.5 Shift&Tilt MC		M8 - 70.35m⌀82 ●
Hartblei 45mm F/3.5 PCS MC
akaWiese 45mm F/3.5 PCS MC		M8 - 70.50m⌀82 ●
Hartblei 45mm F/3.5 TS-PC MC
akaWiese Technoplan-T2 45mm F/3.5 Shift MC		M8 - 70.35m⌀82 ●

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