Minolta SR mount 28mm Lenses

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MC W.Rokkor 28mm 1:2
Focal length28mm
Speed1:2
Minimum focus distance0.3m
Optical design (elements/groups)10/9
Filter thread size55mm
Weight340g
Introduced1975
The first version of the fast 28mm lenses; my sample has severe separation.
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MC W.Rokkor 28mm 1:2
MD W.Rokkor 28mm 1:2
Focal length28mm
Speed1:2
Minimum focus distance0.3m
Optical design (elements/groups)10/9
Filter thread size55mm
Weight340g
Introduced1977
The MD version of the previous lens
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MD W.Rokkor 28mm 1:2
MD 28mm 1:2
Focal length28mm
Speed1:2
Minimum focus distance0.3m
Optical design (elements/groups)9/9
Filter thread size49mm
Weight265g
Introduced1981
The last version of the fast 28mm lenses, this type doesn't have cemented elements anymore and is lighter and smaller.
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MD 28mm 1:2
MC W.Rokkor-SI 28mm 1:2.5
Focal length28mm
Speed1:2.5
Minimum focus distance0.5m
Optical design (elements/groups)9/7
Filter thread size55mm
Weight340g
Introduced1969
First version of the 28/2.5
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MC W.Rokkor-SI 28mm 1:2.5 MC-I
MC W.Rokkor-SI 28mm 1:2.5
Focal length28mm
Speed1:2.5
Minimum focus distance0.5m
Optical design (elements/groups)9/7
Filter thread size55mm
Weight340g
Introduced1969
Second version with the hills-and-dales focussing ring
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MC W.Rokkor-SI 28mm 1:2.5 MC-II
MC W.Rokkor-SI 28mm 1:2.5
Focal length28mm
Speed1:2.5
Minimum focus distance0.5m
Optical design (elements/groups)9/7
Filter thread size55mm
Weight350g
Introduced1973
This is the last of the 3 incarnations of the 28/2.5. My sample suffers from yellowing well-known for this lens type, even though it's the most recent version.
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MC W.Rokkor-SI 28mm 1:2.5 MC-X
MC W.Rokkor 28mm 1:2.8
Focal length28mm
Speed1:2.8
Minimum focus distance0.3m
Optical design (elements/groups)7/7
Filter thread size55mm
Weight240g
Introduced1975
The successor to the 28mm 1:2.5, much smaller and lighter, but also 1/3 of a stop slower. No radio-active elements as well, so no yellowing.
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Minolta MC W.Rokkor 28mm 1:2.8
MC Celtic 28mm 1:2.8
Focal length28mm
Speed1:2.8
Minimum focus distance0.3m
Optical design (elements/groups)7/7
Filter thread size55mm
Weight240g
Introduced1975
The budget version of the MC W.Rokkor 28mm 1:2.8. Slightly sunken dot instead of raised dot and different patterns on the rubber focussing grip and aperture ring.
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Minolta MC Celtic 28mm 1:2.8
MD W.Rokkor 28mm 1:2.8
Focal length28mm
Speed1:2.8
Minimum focus distance0.3m
Optical design (elements/groups)7/7
Filter thread size55mm
Weight240g
Introduced1977
The first MD version of the 28/2.8, the extra MD lug is the only significant change here. It kept the metal aperture ring.
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MD W.Rokkor 28mm 1:2.8
MD Celtic 28mm 1:2.8
Focal length28mm
Speed1:2.8
Minimum focus distance0.3m
Optical design (elements/groups)7/7
Filter thread size55mm
Weight240g
Introduced1977
The budget version of the previous model. I couldn't find data on it. I assume that the basic data are the same as those for the Rokkor equivalent.
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MD Celtic 28mm 1:2.8
MD W.Rokkor 28mm 1:2.8
Focal length28mm
Speed1:2.8
Minimum focus distance0.3m
Optical design (elements/groups)7/7
Filter thread size49mm
Weight180g
Introduced1978
The more compact version with plastic aperture ring.
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MD W.Rokkor 28mm 1:2.8
MD W.Rokkor 28mm 1:2.8
Focal length28mm
Speed1:2.8
Minimum focus distance0.3m
Optical design (elements/groups)7/7
Filter thread size49mm
Weight180g
Introduced1978
Different cosmetics compared to the previous model. Most obvious is the pattern on the rubber ring, but note also the recessed red dot instead of the raised dot and the yellow feet scale.
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MD W.Rokkor 28mm 1:2.8
MD Celtic 28mm 1:2.8
Focal length28mm
Speed1:2.8
Minimum focus distance0.3m
Optical design (elements/groups)7/7
Filter thread size49mm
Weight180g
Introduced1978
This model, the budget version, shows a striking resemblance to the previous Rokkor model.
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MD Celtic 28mm 1:2.8
MD 28mm 1:2.8
Focal length28mm
Speed1:2.8
Minimum focus distance0.3m
Optical design (elements/groups)7/7
Filter thread size49mm
Weight185g
Introduced1981
The plain MD version, this one very probably has the same optical design as its predecessors.
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MD 28mm 1:2.8
MD 28mm 1:2.8
Focal length28mm
Speed1:2.8
Minimum focus distance0.3m
Optical design (elements/groups)5/5
Filter thread size49mm
Weight185g
Introduced1983
New optical design, recognizeable by the slightly different front ring design and the larger radius of the front element.
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MD 28mm 1:2.8
Auto W.Rokkor-SG 28mm 1:3.5
Focal length28mm
Speed1:3.5
Minimum focus distance0.6m
Optical design (elements/groups)7/7
Filter thread size67mm
Weight345g
Introduced1963
Minolta's very first 28mm lens and the only one without meter coupling
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Auto W.Rokkor-SG 28mm 1:3.5 ø67mm
MC W.Rokkor-SG 28mm 1:3.5
Focal length28mm
Speed1:3.5
Minimum focus distance0.6m
Optical design (elements/groups)7/7
Filter thread size67mm
Weight350g
Introduced1966
The MC version of the 28mm, otherwise very similar to the Auto version
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MC W.Rokkor-SG 28mm 1:3.5 ø67mm
MC W.Rokkor-SG 28mm 1:3.5
Focal length28mm
Speed1:3.5
Minimum focus distance0.6m
Optical design (elements/groups)7/7
Filter thread size55mm
Weight245g
Introduced1968
The second 28mm optical design, smaller, lighter and with a 55mm filter thread
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MC W.Rokkor-SG 28mm 1:3.5 MC-I
MC W.Rokkor-SG 28mm 1:3.5
Focal length28mm
Speed1:3.5
Minimum focus distance0.6m
Optical design (elements/groups)7/7
Filter thread size55mm
Weight260g
Introduced1969
Same optical design, but different cosmetics, notably the hills-and-dales focussing ring
Picture gallery
MC W.Rokkor-SG 28mm 1:3.5 MC-II
MC W.Rokkor-SG 28mm 1:3.5
Focal length28mm
Speed1:3.5
Minimum focus distance0.6m
Optical design (elements/groups)7/7
Filter thread size55mm
Weight260g
Introduced1973
Still the same optical design, but yet another cosmetic change. Note the rubber-clad focussing ring and the black aperture ring.
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MC W.Rokkor-SG 28mm 1:3.5 MC-X
MC Celtic 28mm 1:3.5
Focal length28mm
Speed1:3.5
Minimum focus distance0.6m
Optical design (elements/groups)7/7
Filter thread size55mm
Weight260g
Introduced1974
The same optical design as the previous model. Maybe the coatings are less sophisticated and the usual cosmetic differences between Rokkor and Celtic apply.
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MC W.Rokkor-SG 28mm 1:3.5 MC CE
MC W.Rokkor 28mm 1:3.5
Focal length28mm
Speed1:3.5
Minimum focus distance0.3m
Optical design (elements/groups)5/5
Filter thread size55mm
Weight220g
Introduced1975
A new and simpler optical design and also different styling. No letters anymore for the number of elements and groups and a combined diamond indicator for focus distance and aperture.
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MC W.Rokkor 28mm 1:3.5
MD W.Rokkor 28mm 1:3.5
Focal length28mm
Speed1:3.5
Minimum focus distance0.3m
Optical design (elements/groups)5/5
Filter thread size55mm
Weight195g
Introduced1977
The MD version. Most important feature is its extra lug on the aperture ring for signalling the minimum aperture, als note the different font types on front, focussing and aperture rings. Serial number disappeared from the front ring and is now engraved on the barrel.
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MD W.Rokkor 28mm 1:3.5
MD W.Rokkor 28mm 1:3.5
Focal length28mm
Speed1:3.5
Minimum focus distance0.3m
Optical design (elements/groups)5/5
Filter thread size49mm
Weight160g
Introduced1978
The second MD version has a 49mm filter thread size and plastic aperture ring.
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MD W.Rokkor 28mm 1:3.5
MD 28mm 1:3.5
Focal length28mm
Speed1:3.5
Minimum focus distance0.3m
Optical design (elements/groups)5/5
Filter thread size49mm
Weight170g
Introduced1981
The last version, the plain MD without Rokkor designation.
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MD 28mm 1:3.5

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