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Minolta MD 35mm f/2.8 vs Mamiya-Sekor EF 35mm f/2.8
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PostPosted: Tue Oct 08, 2024 4:30 pm    Post subject: Minolta MD 35mm f/2.8 vs Mamiya-Sekor EF 35mm f/2.8 Reply with quote

Infinity test:
comparison by devoscasper, on Flickr

Conclusion: both lenses are very sharp in the center. The corners of the Minolta are better @ f/2.8, f/4 and f/5.6, @f/8 they are more or less equal.
@f/11, the Mamiya's corners look slightly better.


PostPosted: Tue Oct 08, 2024 6:38 pm    Post subject: Reply with quote

Is the Minolta slighter wider too?


PostPosted: Tue Oct 08, 2024 6:54 pm    Post subject: Reply with quote

Lida wrote:
Is the Minolta slighter wider too?


Yes, a little bit.


PostPosted: Tue Oct 08, 2024 8:15 pm    Post subject: Reply with quote

That pretty much confirms my earlier test results:

https://forum.mflenses.com/userpix/20215/big_4216_artaphot_TEST_35mmf28_primes_1.jpg
https://forum.mflenses.com/test-nione-vintage-2-8-35mm-lenses-on-24-mp-ff-t82723.html

The third and last computation of the Minolta (late MC-X and all MD versions) is an excellent 2.8/35mm lens indeed.
Sadly I don't own the Nikkor AiS 2.8/35mm and the Canon nFD 2.8/35mm, but I suspect them to be on par with the Minolta MD 2.8/35mm!

S


EDIT: some "real life" samples taken with the Mamiya CS 2.8/35mm (which has the same optical computation and performance as the later Sekor EF 2.8/35mm):
https://forum.mflenses.com/mamiya-sekor-cs-and-sekor-ef-28-35mm-t84771.html


PostPosted: Tue Oct 08, 2024 8:30 pm    Post subject: Reply with quote

Caspert,

My best images with the M-S CS 35mm 2.8 are made at mid range distances but with 5.6 and then very detailed overall. Could be some field curvature that suited my scenes better but what you show here surprises me. I guess Mamiya's QC is showing its variation again.


PostPosted: Tue Oct 08, 2024 8:31 pm    Post subject: Reply with quote

Caspert,

My best images with the M-S CS 35mm 2.8 are made at mid range distances but with 5.6 and then very detailed overall. Could be some field curvature that suited my scenes better but what you show here surprises me. I guess Mamiya's QC is showing its variation again.


PostPosted: Wed Oct 09, 2024 7:10 am    Post subject: Reply with quote

Ernst Dinkla wrote:
Caspert,

My best images with the M-S CS 35mm 2.8 are made at mid range distances but with 5.6 and then very detailed overall. Could be some field curvature that suited my scenes better but what you show here surprises me. I guess Mamiya's QC is showing its variation again.


Honestly I think the Mamiya does a pretty good job in my test. @f/8 it is equal to the Minolta MDIII 35/2.8, which may be the best vintage 35/2.8 out there (in terms of sharpness accross the frame). Remember also, that this is done on a 42,4mp sensor; the corner crop is only about 0,8% of the total frame, and is the very extreme corner. @ f/8 and f/11 it is about perfect on this sensor.


PostPosted: Wed Oct 09, 2024 9:23 am    Post subject: Reply with quote

caspert79 wrote:
Ernst Dinkla wrote:
Caspert,

My best images with the M-S CS 35mm 2.8 are made at mid range distances but with 5.6 and then very detailed overall. Could be some field curvature that suited my scenes better but what you show here surprises me. I guess Mamiya's QC is showing its variation again.


Honestly I think the Mamiya does a pretty good job in my test. @f/8 it is equal to the Minolta MDIII 35/2.8, which may be the best vintage 35/2.8 out there (in terms of sharpness accross the frame). Remember also, that this is done on a 42,4mp sensor; the corner crop is only about 0,8% of the total frame, and is the very extreme corner. @ f/8 and f/11 it is about perfect on this sensor.


Could you tell what the distance to the farmhouse is, that I could find a more or less identical scene?
Google maps can help to estimate the as the crow flies distance between spots.


PostPosted: Wed Oct 09, 2024 9:36 am    Post subject: Reply with quote

Ernst Dinkla wrote:
caspert79 wrote:
Ernst Dinkla wrote:
Caspert,

My best images with the M-S CS 35mm 2.8 are made at mid range distances but with 5.6 and then very detailed overall. Could be some field curvature that suited my scenes better but what you show here surprises me. I guess Mamiya's QC is showing its variation again.


Honestly I think the Mamiya does a pretty good job in my test. @f/8 it is equal to the Minolta MDIII 35/2.8, which may be the best vintage 35/2.8 out there (in terms of sharpness accross the frame). Remember also, that this is done on a 42,4mp sensor; the corner crop is only about 0,8% of the total frame, and is the very extreme corner. @ f/8 and f/11 it is about perfect on this sensor.


Could you tell what the distance to the farmhouse is, that I could find a more or less identical scene?
Google maps can help to estimate the as the crow flies distance between spots.


Yes. The distance is over 500 meters.


PostPosted: Wed Oct 09, 2024 9:44 am    Post subject: Reply with quote

caspert79 wrote:
Ernst Dinkla wrote:
caspert79 wrote:
Ernst Dinkla wrote:
Caspert,

My best images with the M-S CS 35mm 2.8 are made at mid range distances but with 5.6 and then very detailed overall. Could be some field curvature that suited my scenes better but what you show here surprises me. I guess Mamiya's QC is showing its variation again.


Honestly I think the Mamiya does a pretty good job in my test. @f/8 it is equal to the Minolta MDIII 35/2.8, which may be the best vintage 35/2.8 out there (in terms of sharpness accross the frame). Remember also, that this is done on a 42,4mp sensor; the corner crop is only about 0,8% of the total frame, and is the very extreme corner. @ f/8 and f/11 it is about perfect on this sensor.


Could you tell what the distance to the farmhouse is, that I could find a more or less identical scene?
Google maps can help to estimate the as the crow flies distance between spots.


Yes. The distance is over 500 meters.


Well the church tower I have a free sight on is at 537 meter. With a bit of improvisation I could do something similar to what you did. South of my premises though so against the sun right now. Still have to find a better landscape scene one day.


PostPosted: Wed Oct 09, 2024 12:12 pm    Post subject: Re: Minolta MD 35mm f/2.8 vs Mamiya-Sekor EF 35mm f/2.8 Reply with quote

Very interesting test thanks for posting!

I keep using my MDII for its great performance on both film and digital.


PostPosted: Wed Oct 09, 2024 1:21 pm    Post subject: Reply with quote

Ernst Dinkla wrote:
caspert79 wrote:
Ernst Dinkla wrote:
caspert79 wrote:
Ernst Dinkla wrote:
Caspert,

My best images with the M-S CS 35mm 2.8 are made at mid range distances but with 5.6 and then very detailed overall. Could be some field curvature that suited my scenes better but what you show here surprises me. I guess Mamiya's QC is showing its variation again.


Honestly I think the Mamiya does a pretty good job in my test. @f/8 it is equal to the Minolta MDIII 35/2.8, which may be the best vintage 35/2.8 out there (in terms of sharpness accross the frame). Remember also, that this is done on a 42,4mp sensor; the corner crop is only about 0,8% of the total frame, and is the very extreme corner. @ f/8 and f/11 it is about perfect on this sensor.


Could you tell what the distance to the farmhouse is, that I could find a more or less identical scene?
Google maps can help to estimate the as the crow flies distance between spots.


Yes. The distance is over 500 meters.


Well the church tower I have a free sight on is at 537 meter. With a bit of improvisation I could do something similar to what you did. South of my premises though so against the sun right now. Still have to find a better landscape scene one day.


Can you post some images in full resolution you made before with the Mamiya lens? Just curious.

Note: the way I checked my aperture settings with this lens, is by comparing shutter times with the ones of the Minolta. As you probably know the aperture control of this lens is through the adapter, and not the original aperture ring. It is possible that they are slightly off. Half a stop difference in the far corners could be the difference between sharp and not so sharp. How do you check the aperture setting of your CS lens? There's no dedicated adapter on the market as far as I know.


PostPosted: Wed Oct 09, 2024 6:46 pm    Post subject: Reply with quote

https://www.dpreview.com/forums/post/59981603

Some of the first takes with the lens.

The CS mount is converted to EF mount (+ EMF chip) for mounting on a Metabones IV adapter to a A7RII. Aperture mechanism somewhat changed by reversing a spring internally, aperture ring function is not changed.


PostPosted: Wed Oct 09, 2024 7:23 pm    Post subject: Reply with quote

Ernst Dinkla wrote:
https://www.dpreview.com/forums/post/59981603

Some of the first takes with the lens.

The CS mount is converted to EF mount (+ EMF chip) for mounting on a Metabones IV adapter to a A7RII. Aperture mechanism somewhat changed by reversing a spring internally, aperture ring function is not changed.


Those pictures look pretty good, but it's hard to compare them with shots @ infinity. Click for full size.
Here's a full infinity picture of the Mamiya @ f/8: test image Mamiya EF 35mm f/2.8 @ f/8 by devoscasper, on Flickr

I would say the results are pretty good overall. In very fine detailed object (such as trees @ infinity), deviations from absolute sharpness will be more apparent than closer by objects with less fine details.


PostPosted: Thu Oct 10, 2024 1:29 pm    Post subject: Reply with quote

Two more comparisons:
Bloem28comparison by devoscasper, on Flickr

Wide open, at close distance, the Mamiya is not quite as sharp and contrasty as the Minolta.

Bloem56comparison by devoscasper, on Flickr

@f/5.6, I don't see much difference. Both images look very good. The Minolta has slightly more saturated colors.