Mamiya K/L 250mm F/4.5 L-A

Short telephoto prime lens • Film era • Discontinued

  • Announced:
  • · No data
  • Production status:
  • ● Discontinued
  • Country of design:
  • · Japan
  • Original name:
  • · APO Mamiya K/L 1:4.5 f=250mm L
  • Class:
  • · Slow 6x7 medium-format short telephoto prime lens
  • · Professional model (Top class)
  • System:
  • · Mamiya RB67 (1970)

Model history (2)

■Mamiya-Sekor Z 250mm F/4.5 [W]A5 - 41.85m⌀77 1982 ●
■Mamiya K/L 250mm F/4.5 L-AA5 - 41.85m⌀77 ●

Specification

Optical design:
Medium format 6x7
250mm
F/4.5
5 elements in 4 groups (Ernostar)
Mamiya RB67 [111mm]
20.4°
Diaphragm mechanism:
Diaphragm type:
Automatic
Aperture control:
Aperture ring (Manual settings only)
Built-in leaf shutter:
Type:
Mechanical Seiko #1
Range of shutter speeds:
1 - 1/400 + T
Self-timer (V):
-
Shutter speed control:
Shutter speed ring
Flash sync mode:
X sync
Flash sync terminal:
Yes
Focusing:
1.85m
1.578m
1:5.26
Focusing modes:
Manual focus only
Manual focus control:
None; focusing from the camera
Physical characteristics:
1130g
⌀94×119mm
Accessories:
Screw-type 77mm
Screw-type round
Not available

Sources of data

  • Mamiya interchangeable lenses for Mamiya RB67 Professional instructions.
  • Mamiya RB67 Pro-SD system accessories chart.
  • Mamiya medium format cameras booklet (PUB. 9012).
  • Mamiya medium format cameras booklet (PUB. 9022).

Manufacturer description

The 250mm f/4.5 is an unusually compact long telephoto design, with five elements in four groups. It creates accentuated foreshortening and accentuated distance between foreground and background objects. Applications include telephotography, landscape, wildlife, sports and fashion photography, where compression effect is desired.

Mamiya K/L series

The third generation of lenses designed for Mamiya RB67 series medium format 6x7 SLR cameras. Introduced with the Mamiya RB67 Professional SD in 1990.

  • Newer designs optically identical to the RZ67 M series lenses;
  • Mechanical Seiko #1 leaf shutter;
  • All shutter speeds up to 1/400 sec. synchronized automatically for electronic flash;
  • Fully automatic diaphragm;
  • Multi-layer anti-reflection coating;
  • Standardized 77mm filter thread mount for optimized handling with accessories.

Other short telephoto prime lenses in the Mamiya RB67 system

■Mamiya RB67 mount (13)
Mamiya-Sekor 127mm F/3.8A5 - 3⌀77 1970 ●
Mamiya-Sekor NB 127mm F/3.8A5 - 3⌀77 1973 ●
Mamiya-Sekor C 127mm F/3.8A5 - 3⌀77 1974 ●
Mamiya K/L 127mm F/3.5 LA6 - 40.64m⌀77 1990 ●
Mamiya-Sekor C 150mm F/4 SFA5 - 30.86m⌀77 1977 ●
Mamiya K/L 150mm F/3.5 LA6 - 40.82m⌀77 ●
Mamiya K/L 180mm F/4.5 L-AA4 - 31.10m⌀77 ●
Mamiya-Sekor 180mm F/4.5A5 - 31.11m⌀77 1973 ●
Mamiya-Sekor C 180mm F/4.5A5 - 31.11m⌀77 1974 ●
Mamiya K/L 210mm F/4.5 APO LA7 - 51.43m⌀77 1990 ●
Mamiya-Sekor C 250mm F/4.5A5 - 41.85m⌀77 ●
Mamiya-Sekor 250mm F/4.5A5 - 41.85m⌀77 1970 ●
Mamiya K/L 250mm F/4.5 APO LA7 - 51.86m⌀77 1990 ●

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