smc Pentax-M 28mm F/2.8 [II]

Wide-angle prime lens • Film era • Discontinued

smc Pentax-M 28mm F/2.8 [II]
  • Announced:
  • · 1982
  • Production status:
  • ● Discontinued
  • Country of design:
  • · Japan
  • Original name:
  • · ASAHI OPT. CO. SMC PENTAX-M 1:2.8 28mm
  • Class:
  • · Fast full-frame wide-angle prime lens
  • System:
  • · Pentax K (1975)

Abbreviations

SMC 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.
M A manual focus lens with automatic maximum aperture indexing, which is a mechanical system for coupling the lens to the camera's exposure system. More compact and lighter than the standard K-series counterpart, but with no sacrifice in quality of construction, resolution, durability or contrast. Learn more
II Second generation.

Model history (5)

■smc Pentax-M 28mm F/2.8 [I]A7 - 70.30m⌀49 1977 ●
■smc Pentax-M 28mm F/2.8 [II]A7 - 70.30m⌀49 1982 ●
—Takumar Bayonet 28mm F/2.8 1984 ●
■smc Pentax-A 28mm F/2.8A7 - 70.30m⌀49 1983 ●
—Takumar-A 28mm F/2.8 1984 ●
■smc Pentax-F 28mm F/2.8A7 - 70.30m⌀49 1987 ●
■smc Pentax-FA 28mm F/2.8 ALA5 - 50.30m⌀49 1991 ●

Specification

Optical design:
35mm full frame
28mm
F/2.8
7 elements in 7 groups
Pentax K [45.5mm]
75.4° (35mm full frame)
On Pentax K APS-C [1.53x] cameras:
35mm equivalent focal length:
42.8mm (in terms of field of view)
35mm equivalent speed:
F/4.3 (in terms of depth of field)
Diagonal angle of view:
53.6°
Diaphragm mechanism:
Diaphragm type:
Automatic
Aperture control:
Aperture ring (Manual settings only)
5 (five)
Focusing:
0.30m
1:7.7
Focusing modes:
Manual focus only
Manual focus control:
Focusing ring
Physical characteristics:
170g
⌀63×37mm
Accessories:
Screw-type 49mm
PH-S49 - Clamp-on rectangular
<No data>

Sources of data

  • Asahi Pentax series lenses and accessories booklet (PUB. 06771, 60 pages).
  • smc Pentax-A lenses operating manual.
  • Pentax cameras booklet (PUB. 06091, 32 pages).
  • Pentax lenses and accessories booklet (PUB. 06771) (April 1983).
  • Pentax lenses & accessories - A Comprehensive and Versatile Photographic System booklet.

Pentax-M series

The second generation of lenses designed for Asahi Pentax 35mm SLR cameras with bayonet mount. Introduced with Asahi Pentax ME and MX in 1976.

  • Miniaturized lenses with average 20% less weight and length than their standard SMC counterparts, but with no sacrifice in quality of construction, resolution, durability or contrast;
  • Robust, all-metal design with recessed focusing distance scale;
  • Fully automatic diaphragm;
  • Support for TTL open-aperture metering;
  • Extremely accurate manual focusing with rubberized focusing ring;
  • Multi-layer anti-reflection coating.

From the editor

Optically the lens is different from the original smc Pentax-M 28/2.8 and same as the smc Pentax-A 28/2.8 (but without automatic aperture control, of course). It can be distinguished from the original version by the absence of a silver ring on the front.

Other wide-angle prime lenses in the Pentax K system

■Pentax K mount (18)
smc Pentax 24mm F/3.5A9 - 80.25m⌀58 1975 ●
smc Pentax 24mm F/2.8A9 - 80.25m⌀52 1977 ●
smc Pentax-A 24mm F/2.8A9 - 80.25m⌀52 1983 ●
smc Pentax 28mm F/3.5A8 - 70.30m⌀52 1976 ●
smc Pentax-M 28mm F/3.5A6 - 60.30m⌀49 1977 ●
smc Pentax-M 28mm F/2.8 [I]A7 - 70.30m⌀49 1977 ●
smc Pentax-A 28mm F/2.8A7 - 70.30m⌀49 1983 ●
smc Pentax 28mm F/2A9 - 80.30m⌀52 1976 ●
smc Pentax-M 28mm F/2A8 - 70.30m⌀49 1980 ●
smc Pentax-A 28mm F/2A8 - 70.30m⌀49 1983 ●
smc Pentax 30mm F/2.8A7 - 70.30m⌀52 1975 ●
smc Pentax 35mm F/3.5A5 - 40.35m⌀52 1975 ●
smc Pentax-M 35mm F/2.8A6 - 60.30m⌀49 1977 ●
smc Pentax-A 35mm F/2.8A6 - 60.30m⌀49 1983 ●
smc Pentax 35mm F/2A8 - 70.35m⌀52 1975 ●
smc Pentax-M 35mm F/2A7 - 70.30m⌀49 1977 ●
smc Pentax-A 35mm F/2A7 - 70.30m⌀49 1983 ●
smc Pentax-M 40mm F/2.8 • Pancake lensA5 - 40.60m⌀49 1976 ●

Lenses with similar focal length

■Pentax K mount (60)
Chinar 28mm F/2.8 [M.C]
akaHanimex Automatic 28mm F/2.8		A7 - 70.40m⌀52 ●
Chinon Auto 28mm F/2.8 Multi-Coated
akaAgfa Color 28mm F/2.8 Multi-Coated		A7 - 70.30m⌀49 1979 ●
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 ●
Cosina 28mm F/2.8 MC Macro
akaCarl Zeiss Jena II 28mm F/2.8 MC Macro
akaPhoenix 28mm F/2.8 Macro
akaVivitar Wide Angle 28mm F/2.8 MC		A5 - 50.22m⌀49 ●
Cosina Cosinon-W 28mm F/2 MC
akaPetri 28mm F/2 MC		A8 - 70.30m⌀49 1981 ●
Cosina Cosinon-W 24mm F/2.8 MCA7 - 70.25m⌀49 1981 ●
Cosina Cosinon-W 28mm F/2.8 MC
akaBauer Neovaron 28mm F/2.8 Multicoated
akaCarl Zeiss Jena 28mm F/2.8 MC
akaMiranda 28mm F/2.8 MC
akaVivitar Auto 28mm F/2.8 VMC		A6 - 60.30m⌀49 1981 ●
Hanimex Automatic 28mm F/2.8 MCA8 - 70.30m⌀55 ●
Irix 30mm F/1.4 SLRA13 - 110.34m⌀86 2021 ●
Kino Precision Kiron 24mm F/2 MCA8 - 80.30m⌀55 1980 ●
Kino Precision Kiron 28mm F/2 MCA8 - 80.30m⌀55 1980 ●
Kino Precision Kiron 28mm F/2.8 MCA? - ?0.30m⌀55 1980 ●
Panagor Auto Wide-Angle 28mm F/2.8 PMCA7 - 60.30m⌀49 ●
Panagor Auto Wide Angle 28mm F/2.5 [PMC] Type 2A8 - 70.30m⌀67 ●
Panagor Auto Wide-Angle 28mm F/2 PMCA8 - 80.30m⌀55 ●
Panagor Auto Wide-Angle 24mm F/2.5 PMCA? - ?0.30m⌀55 ●
Quantaray 28mm F/2.8 MCA? - ?0.30m⌀49 ●
Ricoh XR Rikenon 28mm F/3.5 Aspheric • Pancake lensA5 - 40.35m⌀52 ●
Ricoh XR Rikenon 28mm F/2.8A7 - 70.30m⌀52 1980 ●
Ricoh XR Rikenon 24mm F/2.8A7 - 70.18m⌀52 1982 ●
Ricoh XR Rikenon 28mm F/3.5A6 - 60.30m⌀52 1977 ●
Ricoh Rikenon P 28mm F/2.8A7 - 70.30m⌀52 1984 ●
Ricoh Rikenon P 28mm F/2.8 MacroA5 - 50.22m⌀49 ●
Sigma MF Super-Wide 24mm F/2.8 Multi-Coated IIA8 - 70.18m⌀52 1988 ●
Sigma MF High-Speed Wide 28mm F/1.8 Aspherical II ZENA9 - 80.30m⌀58 1994 ●
Sigma MF High-Speed Wide 28mm F/1.8 Aspherical Multi-Coated ZENA9 - 80.30m⌀58 1990 ●
Sigma MF Mini-Wide 28mm F/2.8 Multi-Coated II
akaQuantaray 28mm F/2.8 Multi-Coated		A6 - 60.22m⌀52 1985 ●
Sigma MF H.L. Wide 28mm F/2.8 Multi-CoatedA8 - 70.22m⌀52 1984 ●
Sigma MF Super-Wide 24mm F/2.8 Multi-CoatedA7 - 70.18m⌀52 1981 ●
Sigma MF Mini-Wide 28mm F/2.8 Multi-Coated
akaPentacon Prakticar PM 28mm F/2.8 MC		A7 - 60.22m⌀52 1978 ●
Sigma[-XQ] MF 28mm F/2.8 Filtermatic Multi-CoatedA8 - 70.35m⌀52 1978 ●
Sigma[-XQ] MF 24mm F/2.8 Filtermatic Multi-CoatedA10 - 80.25m⌀62 1978 ●
Sigma-Z MF 24mm F/2.8 [Multi-Coated]A10 - 80.25m⌀62 1975 ●
Sigma-Z MF 28mm F/2.8 [Multi-Coated]A7 - 60.40m⌀62 1975 ●
Soligor C/D 28mm F/2 P (s/n 1xxxxxxx)A8 - 70.23m⌀58 1974 ●
Soligor G/S Wide-Auto 24mm F/2.5 MC (s/n 3xxxxxx)A9 - 70.30m⌀55 ●
Soligor G/S Wide-Auto 28mm F/2.5 MC (s/n 3xxxxxx)A8 - 80.30m⌀52 ●
Soligor C/D 28mm F/2.8 MCA7 - 60.40m⌀58 ●
Soligor C/D 28mm F/2.8 (s/n 1xxxxxxx)A7 - 70.30m⌀52 ●
Soligor Wide-Auto 28mm F/2.8 (s/n 1xxxxxxx)A7 - 60.30m⌀58 ●
Soligor C/D Dualfocal 28+35mm F/3.5+3.8 MCA9 - 90.40m⌀52 1981 ●
Tokina SL 28mm F/2.8A5 - 50.30m⌀49 ●
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 ●
Tokina 28mm F/2.8 RMC
akaVoigtlander Color-Skoparet 28mm F/2.8 MC		A5 - 50.30m⌀52 ●
Vivitar Series 1 Auto Wide Angle 28mm F/1.9 VMC (s/n 37xxxxxx)A9 - 80.30m⌀58 1976 ●
Vivitar [Auto] Wide-Angle 24mm F/2 [MC] Compact (s/n 22xxxxxx)A8 - 80.30m⌀55 1978 ●
Vivitar [Auto] Wide-Angle 28mm F/2 [MC] Compact (s/n 22xxxxxx)A8 - 80.30m⌀55 1978 ●
Vivitar Auto Wide-Angle 28mm F/2.5 Type 2 (s/n 22xxxxxx)A8 - 70.30m⌀67 ●
Vivitar Auto Wide-Angle 28mm F/2.5 Type 1 (s/n 22xxxxxx)A8 - 70.30m⌀62 1969 ●
Vivitar [Auto] Wide Angle 28mm F/2.8 [MC] Compact [I] (s/n 28xxxxxx)A7 - 70.30m⌀49 ●
Vivitar Wide Angle 28mm F/2.8 MC Compact [II] (s/n 42xxxxxx)A7 - 70.30m⌀49 1983 ●
Vivitar Wide Angle 28mm F/2 MC Close Focus (s/n 28xxxxxx)A8 - 70.23m⌀49 1983 ●
Vivitar Wide Angle 28mm F/2.8 MC Close Focus (s/n 28xxxxxx)A5 - 50.23m⌀49 ●
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 28mm F/2.8 MC (s/n 9xxxxxxx)A5 - 50.23m⌀49 ●
Vivitar Wide Angle 28mm F/2.8 MC (s/n 61xxxxxx)A? - ?⌀52 ●
Carl Zeiss Classic Distagon T* 25mm F/2.8 ZF / ZF.2 / ZK / ZSA10 - 80.17mE58 2006 ●
■Interchangeable mount (25)
Hanimex 28mm F/2.8 [T]
akaHanimex 28mm F/3		P7 - ?0.45m⌀58 ●
Sankyo Kohki W-Komura 28mm F/3.5 [Unidapter]P6 - ?0.40m⌀55 ●
Sankyo Kohki W-Komura 24mm F/3.5 [Unidapter Auto]A7 - ?0.26m⌀52 ●
Sankyo Kohki W-Komura 28mm F/3.5 [Unidapter Auto]A8 - ?0.30m⌀52 ●
Komuranon 24mm F/2.5 K·M·CA11 - 80.26m⌀58 1974 ●
Komuranon 28mm F/2.5 K·M·CA9 - 70.30m⌀58 1974 ●
Sigma[-XQ] MF [Wide] 24mm F/2.8 Filtermatic [Multi-Coated] [YS]A10 - 80.20m⌀62 1972 ●
Sigma MF Widemax 28mm F/2.8 [Multi] [YS]A7 - 60.30m⌀62 1970 ●
Soligor Wide-Auto 28mm F/2.8 (s/n 1xxxxxxx) [T-4]A7 - 60.30m⌀58 ●
Soligor Wide-Auto 24mm F/2.8 (s/n 1xxxxxxx) [T-4]A8 - 70.30m⌀67 ●
Soligor Wide Angle 28mm F/2.8 [T]P6 - 63.5 ft.⌀58 ●
Mir-10A 28mm F/3.5 [T]
akaМИР-10А 28mm F/3.5		P8 - 70.20m⌀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 28mm F/2.5 MC 02B [Adaptall-2]A7 - 70.25m⌀49 1979 ●
Tamron 24mm F/2.5 CW-24 [Adaptall]A10 - 90.25m⌀55 1976 ●
Tamron 28mm F/2.8 CW-28 [Adaptall]A7 - 70.25m⌀52 1976 ●
Tamron Auto 24mm F/3.5 [Adapt-A-Matic]A8 - 60.25m⌀72 1971 ●
Tamron Auto 28mm F/2.8 [Adapt-A-Matic]A7 - 70.22m⌀62 1969 ●
Tamron Auto 28mm F/2.8 [Adapt-A-Matic]A7 - 70.22m⌀58 1972 ●
Vivitar Wide Angle 28mm F/2.5 [T]P8 - 70.30m⌀62 ●
Vivitar Auto Wide-Angle 28mm F/2.8 (s/n 37xxxxxxx) [T-4]A7 - 60.30m⌀58 1968 ●
Vivitar Auto Wide-Angle 24mm F/2.8 (s/n 37xxxxx) [T-4]A8 - 70.30m⌀67 ●
Vivitar Auto Wide-Angle 28mm F/2.5 (s/n 37xxxxxx) [TX]A7 - 70.24m⌀52 1976 ●
Vivitar Auto Wide-Angle 24mm F/2.8 (s/n 37xxxxxx) [TX]A8 - 70.23m⌀58 1976 ●

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