Minolta W.Rokkor-PI 21mm F/4.5

Ultra-wide angle prime lens • Film era • Discontinued

  • Announced:
  • · October 1962
  • Production status:
  • ● Discontinued
  • Country of design:
  • · Japan
  • Original name:
  • · MINOLTA W.ROKKOR-PI 1:4.5 f=21mm
  • Class:
  • · Slow full-frame ultra-wide angle prime lens
  • · Professional model
  • · Pancake lens
  • System:
  • · Minolta SR (1958)

Model history (2)

■Minolta W.Rokkor-PI 21mm F/4.5 • Pancake lensM9 - 50.90m⌀55 1962 ●
■Minolta W.Rokkor-QH 21mm F/4 • Pancake lensM8 - 40.90m⌀55 1963 ●

Specification

Optical design:
35mm full frame
21mm
F/4.5
9 elements in 5 groups
Non-retrofocus
Minolta SR [43.5mm]
91.7° (35mm full frame)
Diaphragm mechanism:
Diaphragm type:
Manual
Aperture control:
Aperture ring
6 (six)
Focusing:
0.90m
<No data>
Focusing modes:
Manual focus only
Manual focus control:
Focusing ring
Physical characteristics:
170g
⌀60×20mm
Accessories:
Screw-type 55mm
<No data>
<No data>

Source of data

  • Own research.

From the editor

The first ultra-wide-angle lens for Minolta SR series 35mm SLR cameras. Production of this series of cameras began in 1958, but due to its non-retrofocus design, this lens could only be used with the SR-7, introduced in 1962, which had a mirror lock-up feature. Since this made it impossible to compose and focus through the camera's viewfinder, the lens was sold with a special external viewfinder. The focusing ring is narrow, which makes focusing somewhat difficult, but there is a slider for more comfortable grip.

Notes

  • The lens was designed for use with 35mm film SLR cameras with the mirror locked in the up position.

Other ultra-wide angle prime lenses in the Minolta SR system

■Minolta SR mount (8)
Minolta MC W.Rokkor 17mm F/4 Gen. XA11 - 90.25m⌀72 1975 ●
Minolta MD W.Rokkor 17mm F/4A11 - 90.25m⌀72 1977 ●
Minolta MD 17mm F/4A11 - 90.25m⌀72 1981 ●
Minolta MD W.Rokkor 20mm F/2.8A10 - 90.25m⌀55 1977 ●
Minolta MD 20mm F/2.8A10 - 90.25m⌀55 1981 ●
Minolta W.Rokkor-QH 21mm F/4 • Pancake lensM8 - 40.90m⌀55 1963 ●
Minolta MC W.Rokkor-NL 21mm F/2.8A12 - 90.25m⌀72 1971 ●
Minolta MC W.Rokkor[-NL] 21mm F/2.8 Gen. XA12 - 90.25m⌀72 1973 ●

Lenses with similar focal length

■Minolta SR mount (37)
Chinon 24mm F/2.5 Multi Coated
akaAuto-Alpa 24mm F/2.5 Multi-Coated		A10 - 90.25m⌀55 ●
Cosina Wide Angle 20mm F/3.8 MCA9 - 80.20m⌀62 ●
Cosina 24mm F/2.8 MC Macro
akaCarl Zeiss Jena II 24mm F/2.8 MC Macro
akaPhoenix 24mm F/2.8 Macro		A7 - 70.19m⌀52 ●
Kino Precision Kiron 24mm F/2 MCA8 - 80.30m⌀55 1980 ●
Minolta MC W.Rokkor-SI 24mm F/2.8 Gen. XA9 - 70.30m⌀55 1973 ●
Minolta MD 24mm F/2.8A8 - 80.25m⌀49 1981 ●
Minolta MC Rokkor 24mm F/2.8 VFC Gen. XA9 - 70.30m⌀55 1975 ●
Minolta MC W.Rokkor 24mm F/2.8 Gen. XA9 - 70.30m⌀55 1975 ●
Minolta MD W.Rokkor 24mm F/2.8A9 - 70.30m⌀55 1977 ●
Minolta MD W.Rokkor 24mm F/2.8A9 - 70.30m⌀55 1978 ●
Minolta MD W.Rokkor 24mm F/2.8A9 - 70.30m⌀55 1978 ●
Minolta MD Rokkor 24mm F/2.8 VFCA9 - 70.30m⌀55 1977 ●
Minolta MD 24mm F/2.8 VFCA9 - 70.30m⌀55 1982 ●
Panagor Auto Wide Angle 21mm F/4A9 - 70.16m⌀82 ●
Panagor Auto Wide-Angle 24mm F/2.5 PMCA? - ?0.30m⌀55 ●
Sigma MF 18mm F/3.5 ZENA10 - 90.25m⌀72 1992 ●
Sigma MF Super-Wide 24mm F/2.8 Multi-Coated IIA8 - 70.18m⌀52 1988 ●
Sigma MF Ultra-Wide 18mm F/2.8 Multi-Coated IIA10 - 90.25m⌀72 1984 ●
Sigma MF Super-Wide 24mm F/2.8 Multi-CoatedA7 - 70.18m⌀52 1981 ●
Sigma MF Ultra-Wide 18mm F/2.8 Multi-CoatedA11 - 90.25m⌀67 1980 ●
Sigma[-XQ] MF 24mm F/2.8 Filtermatic Multi-CoatedA10 - 80.25m⌀62 1978 ●
Sigma MF 18mm F/2.8 FiltermaticA12 - 90.23m⌀77 1978 ●
Sigma-Z MF 24mm F/2.8 [Multi-Coated]A10 - 80.25m⌀62 1975 ●
Soligor G/S Wide-Auto 24mm F/2.5 MC (s/n 3xxxxxx)A9 - 70.30m⌀55 ●
Soligor C/D Wide-Auto 20mm F/2.8 MCA9 - 70.20m⌀58 ●
Soligor Wide-Auto 21mm F/3.8 (s/n 1xxxxxxx)A9 - 80.35m⌀72 ●
Spiratone Ultra Wideangle 18mm F/3.5 Pluracoat [I]A11 - 80.22m⌀72 1979 ●
Spiratone Ultra Wideangle 18mm F/3.5 Pluracoat [II]A11 - 90.25m⌀67 ●
Spiratone 20mm F/2.8 Plura-CoatA9 - 70.20m⌀58 1983 ●
Tokina SL 24mm F/2.8 [II]A7 - 70.19m⌀52 ●
Tokina 24mm F/2.8 RMC
akaTokina SL 24mm F/2.8 [I]		A8 - 80.27m⌀52 ●
Vivitar Auto Wide-Angle 20mm F/3.8 (s/n 22xxxxxx)A9 - 70.15m⌀82 1969 ●
Vivitar [Auto] Wide-Angle 24mm F/2 [MC] Compact (s/n 22xxxxxx)A8 - 80.30m⌀55 1978 ●
Vivitar Wide Angle 24mm F/2.8 MC (s/n 9xxxxxxx)A7 - 70.19m⌀52 ●
Vivitar Auto Wide-Angle 24mm F/2.8 (s/n 37xxxxxx)A8 - 70.25m⌀58 1976 ●
Vivitar Wide Angle 24mm F/2 MC Compact (s/n 28xxxxxx)A8 - 80.30m⌀52 ●
Vivitar Wide Angle 19mm F/3.8 MC (s/n 9xxxxxxx)A9 - 80.20m⌀62 ●
■Interchangeable mount (14)
Sankyo Kohki W-Komura 24mm F/3.5 [Unidapter Auto]A7 - ?0.26m⌀52 ●
Komuranon 24mm F/2.5 K·M·CA11 - 80.26m⌀58 1974 ●
Sigma[-XQ] MF [Widerama] 18mm F/3.2 [Multi-Coated] [YS]
akaAccura/Sigma 18mm F/3.2
akaSpiratone 18mm F/3.2
akaSpiratone 18mm F/3.5		A12 - 100.17m⌀72 1972 ●
Sigma[-XQ] MF [Wide] 24mm F/2.8 Filtermatic [Multi-Coated] [YS]A10 - 80.20m⌀62 1972 ●
Soligor Wide-Auto 21mm F/3.8 (s/n 1xxxxxx) [T-4]A9 - 80.35m⌀72 1970 ●
Soligor Wide-Auto 24mm F/2.8 (s/n 1xxxxxxx) [T-4]A8 - 70.30m⌀67 ●
Tamron 24mm F/2.5 MC 01B [Adaptall-2]A10 - 90.25m⌀55 1979 ●
Tamron 24mm F/2.5 01BB [Adaptall-2]A10 - 90.25m⌀55 1987 ●
Tamron 24mm F/2.5 CW-24 [Adaptall]A10 - 90.25m⌀55 1976 ●
Tamron Auto 21mm F/4.5 [Adapt-A-Matic]A8 - 60.25m⌀82 1970 ●
Tamron Auto 24mm F/3.5 [Adapt-A-Matic]A8 - 60.25m⌀72 1971 ●
Vivitar Auto Wide-Angle 21mm F/3.8 (s/n 37xxxxxxx) [T-4]A9 - 80.35m⌀72 ●
Vivitar Auto Wide-Angle 24mm F/2.8 (s/n 37xxxxx) [T-4]A8 - 70.30m⌀67 ●
Vivitar Auto Wide-Angle 24mm F/2.8 (s/n 37xxxxxx) [TX]A8 - 70.23m⌀58 1976 ●

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