LensRomantic: Minolta MC Rokkor PF 58mm 1:1.4
Comparison of two different copies of Minolta MC Rokkor PF 58mm 1:1.4. (Hills&Valleys/Knurled or MC-II style by collectors classification)
‘LensRomantic’ tests description is here. Tests of this type are mostly for collectors or tech-enthusiasts, for photographers I recommend to go directly to the lens review.
Minolta Rokkor MC 58mm F1.4 is one of the most recognizable Minolta lenses. He is loved and well known by both photographers and collectors.
|Copy #1||Copy #2|
|Cosmetic Condition:||Near mint||Near mint|
This comparison is correct only for conditions and equipment used for tests. Test results can differ if any element is changed.
Tested lens review:
Long distance – sharpness:
Test description: Camera Sony A7II (24mpx, full frame) was fixed on the tripod and managed remotely with computer display as a viewfinder. Targets (buildings) were fixed by gravity power on the distances in more than 200 meters. All shots were made with apertures from fully opened and up to F16. ISO-100. Shutter Speed – depends on light (camera A-mode). SteadyShot – OFF. Focus was manually corrected for each shot to exclude focus-shift.
Finally, pictures were converted from ARW-files in Capture One with default settings (some single files have a slight light correction, for better visual convenience in comparison), then cut into 300×200 px elements (100% crops), combined into diagrams and exported into JPEG-files.
- I am just a man, I do not pretend that in all cases my focus settings were absolutely accurate. But I aspired to it.
- Bad weather is better for this test – low-light is good for wide-opened apertures to slow down shutter speed.
Short distance – sharpness:
Test description: target is a 10×15 cm picture (printed, glossy photo paper), fixed on the wall by scotch. Distance – 1.7m. Camera Sony A7II (24mpx, full frame) was fixed on the tripod and managed remotely with computer display as a viewfinder. All groups of shots were repeated 3 times for every target position on all apertures from fully opened up to F16, ISO-100, WB – same for all shots. SteadyShot – OFF. Focus was manually corrected for each shot. After all needed shots have been taken for one target position – I moved the target to the next place. Main idea – to exclude the field curvature affect on so close distance. Of course, I can’t be absolutely accurate, but test results looks correct.
Finally, pictures were converted from ARW-files in Capture One with default settings (Some single files have a slight light correction, for better visual convenience in comparison), then cropped for 300×200 px elements, combined into diagrams and exported into JPEG-files.
Original target image (printed in horizontal orientation on 10cm X 15cm glossy photo paper)
‘What does it mean?’ – my conclusion:
– a slightly color difference on the close distance test is because shootout has been performed in different times. It doesn’t affect the result.
– I know that at least one serious collector is working on researching of this lens model right this time, and if you read this article much later than it was published I recommend to looking for another materials – it possible that another more detailed information are available.
I don’t see deviations between these two copies on both tests which are worth to be mentioned. They work like twins.