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Sharpest 85mm legacy lens


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#41 Gilgenberg

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Posted 13 April 2016 - 07:21 AM

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the lense´s:

Mamiya sekor C 8 corner (2).jpg Mamiya sekor C 8 corner (1).jpg


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#42 EDBR

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Posted 13 April 2016 - 02:36 PM

To Gilgenberg 

 

Wauw, nice and indeed much better than the Contax C/Y.

In favour against the Contax G even more compact and good to use on my Mirex adapter !!!

Advantage of using the manual focus ring on the lens (for those who don’t know the Contax G lenses don’t have a focus ring)

Regarding quality must say that it scored rather equal to my eyes (old eyes and didn't download the images).

So indeed big advantage for the Mamiya !

Are there any different kinds or versions, sometimes the quality can change between different versions in time.

What about a good compact 200 or 135 (just to use in the classic way, corners of my new FE 70-200 f4 sony not totally sharp, even at f2.8 my Contax 90mm performs better than my 70-200 at f8.0 in the corners).

Just ordered a second hand 200mm Minolta MC f4.0, but maybe better legacy lenses in the wild J

 Thanks, great work, will get a 80mm Mamiya ASAP !!!



#43 Gilgenberg

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Posted 13 April 2016 - 02:48 PM

i have also also a Sekor 150mm 3.5 very good lens, but my minolta MD 135mm 2.8 (4 lenses in 4 groups) is  better 

 

yes i think the newer "N" version of the sekor 80mm has better coating and there is a 1.9 version but i think it´s weight is double

 

IMOH there is no need for 1.9

 

sharpness of the sekor is awesome:

 

https://www.flickr.c.../in/dateposted/

 

and focusing is a dream with a lens in good shape

 

P.S. the MC 200mm f4  is brilliant!



#44 nomad

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Posted 13 April 2016 - 06:22 PM

Tested a Minolta 200mm f4 against an Olympus 200mm f4 and the Minolta won…


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#45 Gilgenberg

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Posted 13 April 2016 - 08:03 PM

DSC04556.jpg

 

i have to ad a information about using the Mamiya sekor 80mm on Sony A7 Body´s 

 

As the Mamiya is a Mediumformat lens, there are lots of reflections inside the Adapter and so reflection are coming to the sensor.

 

So i have added a velour tube inside the adapter to absorb the reflections. 

 

This method is very effective!



#46 Gilgenberg

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Posted 14 April 2016 - 07:31 AM

so i have to withdraw my statement about the Mamiya sekor 150mm 3.5

 

it is sharper at F8 than the Minolta MD 135m and has more resolution and less CA

 

corner at F8 are much better...so it is also a great lens if you look for sharpness through the hole frame


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#47 EDBR

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Posted 18 April 2016 - 10:58 AM

Hello back again, was on the move...

Regarding 80mm and 135mm Mamiya

The 80mm is rather behaving as a 50mm and the 135 around 85mm right ?



#48 nomad

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Posted 18 April 2016 - 02:20 PM

No. A 80mm is a 80mm is a 80mm– and so forth.



#49 nomad

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Posted 18 April 2016 - 08:49 PM

Good news about the Techart adapter for Contax G: it works really well on the A7R II. So, it seems to be optimized for that AF and doesn't like the weaker AF of my former A7R.



#50 Golem

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Posted 19 April 2016 - 06:34 AM

attachicon.gifDSC04556.jpg

.............

 

As the Mamiya is a Mediumformat lens, there are lots of reflections inside

the Adapter and so reflection are coming to the sensor.

 

So i have added a velour tube inside the adapter to absorb the reflections. 

 

This method is very effective!

  

Velour lining is a source of dust. To eliminate the light shining  

on the walls inside the adapter, you use a lens shade. That's

what lens shades are for. And even if the velour lining were not

a dust bank, adding a lens shade is still worthwhile. It was very

worthwhile when typical cameras had a tapered bellows, which

functionally does the job that you expect the velour to do, and

does it much better ... and yet lens shades were universal.  

  

BTW, if you can find some textured black rubber in thin sheet

form [typically used a grippy covering material] replace all that

dust grabbing velour with textured black rubber even if you'd

rather avoid lens shades.



#51 nomad

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Posted 19 April 2016 - 10:10 AM

Another alternative is very high quality matte black paint you can get for painting plastic models. I use Tamiya Color XF-1 (flat black) and it works very well.



#52 EDBR

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Posted 19 April 2016 - 11:30 PM

Nomad, yes was wrong about this
80 mm Mamiya is behaving as a 50mm on a 645 Mamba compared to 35mm
So on a A7 it's a 80mm
http://www.kenrockwe...-equivalent.htm

#53 addicted2light

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Posted 20 April 2016 - 07:33 AM

Nomad, yes was wrong about this
80 mm Mamiya is behaving as a 50mm on a 645 Mamba compared to 35mm
So on a A7 it's a 80mm
http://www.kenrockwe...-equivalent.htm

 

 

Yes and no.

 

Focal length is independent from the format you use it on: so an 80mm will have the same "compression" of the focal planes, depth of field, size of the "bokeh balls" etc. whatever format you use it on. 

 

What changes is the crop factor, meaning that (assuming a lens that can cover multiple formats, i.e. a lens with a large enough image circle) a smaller format will simply use a smaller portion of the lens image circle. All these "equivalency tables" all that are discussing is really equivalency in terms of framing, not in terms of "optical inherent qualities", so to speak.

 

That's why, for example smaller formats (m4/3, APS-c etc.) seem to exhibit more depth of field compared to larger ones. It's because with a smaller format you will use, to get the same frame (shooting from the same position), a shorter lens with a more extended DOF (for example a 25mm on m4/3 and a 50mm on FF).


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“You cannot depend on your eyes if your imagination is out of focus” Mark Twain

 

#54 Gilgenberg

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Posted 20 April 2016 - 08:35 AM

Thank´s for the info

 

so long i have no issues with dust from the velour



#55 nomad

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Posted 20 April 2016 - 11:07 AM

Please let's drop this "behaves as XXmm", it's so confusing. A lens keeps it's properties, whatever sensor is behind it.

 

A different size of sensor changes the viewing angle of the photographic system, not the focal length.



#56 EDBR

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Posted 20 April 2016 - 05:32 PM

Yes Nomad, viewing angle, you have a point.

But could be difficult with all the different sensors sizes and we are so used to these mm.

For me it's still easy to think that a 85mm is a short tele on a 35mm sensor.

 

Gilgenberg, nice point to use velour in adapters.

 

A2L well aware of the crop factor + DOF, use APSC and Full frame with the same lenses. Was temporarily confused about this Mamiya lens because it's not my usual lens brand or thing but will certainly go for the 80mm. Seems nice.



#57 addicted2light

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Posted 20 April 2016 - 06:00 PM

A2L well aware of the crop factor + DOF, use APSC and Full frame with the same lenses. Was temporarily confused about this Mamiya lens because it's not my usual lens brand or thing but will certainly go for the 80mm. Seems nice.


The f/1.9 version of the Mamiya, should you manage to find one at a reasonable price, is quite nice (especially if used on a Mamiya medium format camera, more than on a "small sensor", to be fair).

I bought & tested one once, unfortunately I had to return it stat because it was full of fungus.

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#58 Gilgenberg

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Posted 23 April 2016 - 07:50 PM

but be aware the 80mm 1.9 has 420gr. the  80mm 2.8 N has only 230gr.

 

to have a lighter lens is a big advantage on a small Sony Body!

 

it is getting one of my favorite lenses as it has awesome IQ and such a smooth focus behavier

 

here some fotos:

 

https://www.flickr.c...157667342231201



#59 EDBR

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Posted 29 April 2016 - 08:52 PM

To nomad, 

 

YES, YES the 200mm Minolta is a gem, it shows some CA but those are easily corrected in LR.

See corner sample (100%) of the two lenses: 70-200 f4 against good old minolta side by side at 200mm at f8, or 100€ against 1400€, extreme corner performance.

 

Also see testplatform, problem with the tree but I will not cut for testing.... :-)

 

Good old lenses ar far better....no AF but for landscape photography it4s the way to go !!!!

Attached Images

  • Test.jpg
  • Sony 70-200f4 against 200mmf4 Minolta  both at f8.jpg

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#60 nomad

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Posted 30 April 2016 - 07:23 AM

Hmm, 

as much as I love my Minoltas, your Sony zoom seems a bit soft. Need to check mine against the 200mm f4 Rokkor.




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