Are MD and PG the same

Much later than most of the major competitors who had launched a 1.4 / 50mm euf in the 1960s (Canon, Nikon, Pentax), Minolta came out with a 1.4 / 50mm. Before that, the MC was 1.4 / 58mm (which actually had a focal length of around 60mm) the bright Minolta normal lens. At least the revised second variant of the MC 1.4 / 58mm can definitely compete with the first 1.4 / 50 from Minolta.

Minolta lenses with the key data 1.4 / 50 mm for the SR bayonet were built in at least four optically different variants:

1) The MC-X 1.4 / 50 mm (1973), a seven-lens in five sections, the design of which is based on the legendary MC 1.2 / 58 mm from 1968
2) The MD-I / -II 1.4 / 50 mm (1977), also a seven-lens in five sections
3) The MD-II 1.4 / 50 mm (1979), a seven lens in six groups
4) The MD-III 1.4 / 50mm (1981), whose optical calculation can probably also be found in the Minolta AF 1.4 / 50 mm

All of the mentioned lenses are slightly stopped down on the APS-C (16 MP) and are practically equally sharp; the newer MD constructions are a bit more detailed than the MC 1.4 / 50 mm when the aperture is open.

The MC 1.4 / 50 mm can be used well even on the 36MP full frame when dimmed; open at f1.4 only disturbs a low microcontrast (LoCAs with pink overexposure of the fine image details) and a certain image field curvature (which, however, is usually not negatively noticeable in available light images).


Test on 16MP APS-C

 

MINOLTA 50mm 1: 1.4 (7 lenses / 5 links)

 

Version: MC-X (1973)
MINOLTA 50mm 1: 1.4 (7 lenses / 5 links)

 

Version: MD-I (1977), MD-II (1977)

 

According to official Minolta documents, the new MD-I [7/5] computation was mainly made to reduce the length of the lens (from> 95% of the focal length to <90% of the focal length), while maintaining an " acceptable "performance and - equally important for a SLR lens - the backfocal distance. To reduce costs, the large and thick 2nd lens was made from less expensive glass (nD 1.69, v = 49). At the same time the thickness of the 5th lens (made of more expensive glass with nD 1.79, v = 46) was reduced.

MINOLTA 50mm 1: 1.4 (7 lenses / 6 links)

 

Version: MD-II (1979)
MINOLTA 50mm 1: 1.4 (7 lenses / 6 links)

 

Version: MD-III (1981)

 

 

Minolta Forum: Differences between the various MC / MD 1.4 / 50mm lenses "I'm still not sure whether to switch from the old 50mm MD Rokkor 1: 1.4 (7 lenses in 5 groups - as with the MC Rokkor ) was such a good idea for the new construction with 7 lenses in 6 groups. Since I am less satisfied with the open aperture of my two 50mm MD 1: 1.4 (especially lack of sharpness) than with an early 50mm MD Rokkor 1: 1, 4 I would rather assume a deterioration. I did not notice any differences between the 50mm MC Rokkor 1: 1.4 and 50mm MD Rokkor 1: 1.4 of the same optical construction. "

fwiesenberg (www.mi-fo.de)

 

"By the way, does anyone have an opinion which MD 1,4 / 50 is the better - the older [7/5] design (ø 55 mm) or the later [7/6] design (ø 49 mm)? I only have one copy of the former version myself, so I don't have a comparison. "

"Quite clearly the older one. My two of the last versions are not the best with open aperture (edge ​​blurring) - the older design (three or four reference candidates) does not show this weakness."

O1af / fwiesenberg (www.mi-fo.de)

 

"The older MC Rokkor-PF 58 mm f / 1.4 is" full of character ". Its successor, the MC Rokkor-PG 50 mm f / 1.4, is sharper and richer in contrast, but not as" beautiful "in the Bokeh and shadows. In between these two - in terms of launch date as well as "character" and performance - lies the famous MC Rokkor-PG 58mm f / 1.2. "

"The successor to the MC 1,4 / 50, on the other hand, is the early MD Rokkor 50 mm f / 1.4 (with 55 mm filter thread), which also has seven lenses in five groups, but is still a new design. It is also significantly better than the MC 1,4 / 58, but a touch weaker (for me at least) than the more massive MC 1,4 / 50, which I consider Minolta's most powerful standard lens of all time ... only in bokeh others are a little better, namely the two 58s. "

"The successor to the early MD 1,4 / 50 was the MD Rokkor 1: 1.4 / 50 mm with seven lenses in six groups and 49 mm filter thread, which is available as a Rokkor and a non-Rokkor. I suspect it is also identical to the AF 1: 1.4 / 50 mm with 49 mm filter thread, but I'm not sure. Does anyone know more about this? "

"In my opinion, the very best of the standard lenses is the MC Rokkor-PG 50 mm f / 1.4, closely followed by the MC Rokkor-PG 58 mm f / 1.2, the early MD Rokkor 1.4 f / 1.4 / 50 mm (with 55 mm filter thread) ... and last but not least the inconspicuous MC Rokkor-PF 50 mm f / 2, of which the rumor cannot be eradicated that it is identical to the original Leitz Summicron-R 1: 2 / 50 mm from 1964 (no idea if that's true - probably not ... but it would be possible) The MC Rokkor-PF 58 mm f / 1.4 is also very neat, but shows slight weaknesses when fully opened - six lenses are not really sufficient for f / 1.4. It is still very popular with bokeh connoisseurs and everyone who is looking for the charm of the '60s and' 70s in the image reproduction characteristics. "

O1af (www.mi-fo.de)

 

"There is very little barrel distortion, much better than the Nikkor 50mm f / 1.4. It's sharp at all apertures. It's a little less contrasty due to some veiling at f / 1.4 caused by some residual spherical aberration, however there is still a very sharp image inside the veiling, unlike the Nikkor which is soft all over at f / 1.4. Color balance is neutral. This is an excellent lens. I paid $ 6.95 for mine at a thrift store in Santa Barbara in 2000. Go get one if you can find it. "

Ken Rockwell

 

"Regarding the standard lenses for Minolta-SR bayonet ... I consider the MC Rokkor-PG 50 mm f / 1.4 to be the most powerful overall, closely followed by the MC Rokkor-PG 58 mm f / 1.2 and the small, usually underestimated MC Rokkor-PF 50 mm f / 2. All 1.7 / 50s are a touch weaker than the above, and the Macro-Rokkor 50 mm f / 3.5 can also do them The two 58er Rokkore (MC 1.4 / 58 mm and MC 1.2 / 58 mm) are the bokeh kings, but are different from the more modern designs (late MC, early MD ) slightly exceeded. But with medium and small apertures (from approx. f / 4 - f / 4.5) they are all barely distinguishable; the differences arise above all with large apertures. "

O1af (www.mi-fo.de)

 

"In contrast to the AF versions (which each have the same optical structure) you have to differentiate quite nicely between the individual versions of the MF versions of the 50mm: The 50mm MC Rokkor or MD (Rokkor) 1: 1.7 gives there are 5 outwardly different versions that have the same optical structure (6/5) (and according to my comparisons do nothing to each other in terms of performance), on the other hand there is a 50mm MC Rokkor-PG 1: 1.4 and two early 50mm MD Rokkor 1: 1.4 versions with 7/6 structure and 55mm filter thread, the copies of which were always at least equal to the 50 / 1.7 in my comparisons. Worse with open aperture (and up to aperture 4 or 5.6 - I don't know that exactly more) but cut off the newer 50mm MD (Rokkor) 1: 1.4 with a 7/6 structure and 49mm filter thread.

fwiesenberg (www.mi-fo.de)

 

"... MC Rokkor PG 1.4 / 50mm is at least equal in sharpness to the Contax / Zeiss Planar 1.4 / 50mm rather even a tiny (completely practice irrelevant 200% -400% view with direct switching back and forth) a touch ahead and also a Pentax SMC Takumar 1.4 50mm can keep up at best. The new Sigma 1.4 50mm, with its additional eighth lens, is a bit more contrasty with an open aperture. This probably also applies to the aspherical Leicas, but I have no personal experience with that. My Sigma could then But when stopped down, you can't quite keep up, but personally the range around f2-f5.6 is more important than the performance with the aperture open, that's why I gave the Sigma back in. The MD Rokkor 1.4 50mm is also very, very close in terms of sharpness , as well as good copies of the Minolta AF 1.4 / 50mm. My Minolta AF 1.4 / 50mm with apertures f2.8-f5.6 on the A100 also beat the Contax / Zeiss Planar 1.4 50mm on the C40D, there the comparison is off He has to be provided with clear question marks (CCD 1.5 Crop A100, CMOS 1.6 Crop C40D, the CCD images look simply more contrasting, fresher and sharper even without any sharpening). "

Hans-J. (www.mi-fo.de)

 

The bokeh rating for apertures around f2.8 goes clearly to the MC Rokkor PF 1.4 58mm. All other ratings such as sharpness, contrast, stray light etc. clearly go to the MC Rokkor-PG 1.4 50mm. My PG surpasses all of them at f5.6! other lenses and is sensational right into the corners.

Hans-J. (www.mi-fo.de)

 

"The famous MC Rokkor PG 50m f1.4 on an EOS 300D (Digital Rebel). This is a great performance lens also on DSLR. Viewing the RAW files, I'm impressed with sharpness and contrast at f4-5.6. The bokeh is wonderful at f2-2.8. No light falloff at f2 (thanks to the 1.6X crop factor)! It is a bit soft wide open (but usable). This is one of the best 50mm prime lenses by Minolta togheter with the MC Rokkor 58mm f1.2. Both lens shares the same optical design (7/5). "

Altervista

 

Overview of the Minolta normal lenses in the SR system