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stevemark
Joined: 29 Apr 2011 Posts: 3751 Location: Switzerland
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Posted: Wed Jan 15, 2020 1:01 pm Post subject: |
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stevemark wrote:
kiddo wrote: |
You just make Minolta 100 2.5 look so Sharp.... |
The MD-III 4/100mm Macro is as sharp as the MD-III 2.5/100mm, and it has even less CAs ... just in case you want the best 100mm MD lens _________________ www.artaphot.ch |
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stevemark
Joined: 29 Apr 2011 Posts: 3751 Location: Switzerland
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Posted: Wed Jan 15, 2020 1:05 pm Post subject: |
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stevemark wrote:
vivaldibow wrote: |
Your work is always appreciated! I wonder if you had the Vivitar/Soligor 35-105mm f/3.5
to add in the comparison? Thanks. |
I may have a Vivitar and/or Soligor 3.5/35-105mm lens, stored somewhere in the attic. The two Tokina RMC 3.5/35-105mm lenses i had found there as well, however, were "fogged". Impossible to conduct a meaningful test, and certainly not worth cleaning.
S
EDIT: no Vivitar 35-105 it seems, and the Soligor actually is 3.5/37-105mm! _________________ www.artaphot.ch |
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Gatorengineer64
Joined: 26 Oct 2017 Posts: 279
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Posted: Thu Jan 16, 2020 12:26 am Post subject: |
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Gatorengineer64 wrote:
On the 14th you posted lenses labeled Nikkor P.C 2.5 100 Sample 1/2..... That as a typo? I checked mine tonight and its simply a P which is an earlier single coated variant. Still shoots very well.
The 105 2.5 is per Ken Rockwell 5 elements in 4 groups, whereas I had thought that a Xenon design is 6 elements in 5 groups, but again that is just what I read, i am no optician. I do like the Schneider Xenons.... _________________ A7R4, GFX50R and a bucket of mflenses |
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stevemark
Joined: 29 Apr 2011 Posts: 3751 Location: Switzerland
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Posted: Thu Jan 16, 2020 11:44 am Post subject: |
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stevemark wrote:
Gatorengineer64 wrote: |
On the 14th you posted lenses labeled Nikkor P.C 2.5 100 Sample 1/2..... That as a typo? |
No. My lens looks exactly like this one (apart from the SN of course):
https://www.destoutz.ch/lens_105mm_f2.5_526586.html
Gatorengineer64 wrote: |
I checked mine tonight and its simply a P which is an earlier single coated variant. Still shoots very well. |
It might be the Sonnar version, but until you post an image of your lens from both the front- and backend i can't tell for sure.
Gatorengineer64 wrote: |
The 105 2.5 is per Ken Rockwell 5 elements in 4 groups, whereas I had thought that a Xenon design is 6 elements in 5 groups, but again that is just what I read, i am no optician. I do like the Schneider Xenons.... |
The Xenon design is a 5/4, and NOT a 6/5; so what you read was wrong!
Again, try to read Haruo Sato publication on the Nikkor 2.5/105mm
https://imaging.nikon.com/history/story/0005/index.htm
Haruo Sato is one of the most eminent current lens designers. He has calculated - among many others - the Nikkor 2.8/14-24mm FF lens which was a huge step forward in the area of superwides: It was better than any contemporary 14mm prime!
S _________________ www.artaphot.ch |
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Gerald
Joined: 25 Mar 2014 Posts: 1196 Location: Brazil
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Posted: Thu Jan 16, 2020 1:38 pm Post subject: |
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Gerald wrote:
Stephan, I think he meant the lens is a 105mm but you labeled it as 100mm... _________________ If raindrops were perfect lenses, the rainbow did not exist. |
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Gatorengineer64
Joined: 26 Oct 2017 Posts: 279
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Posted: Thu Jan 16, 2020 11:03 pm Post subject: |
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Gatorengineer64 wrote:
Your label on your pics listed it as a 100... I understand now you meant 105...
Also if you read your Nikon link you referene it refers to the design as a Xenotar type which is not the same as a Xenon.
https://rugarchives.org/1998-08/00509.html
In the same way a Septon isnt a planar, might be a cousin but Allphotolens lists the vernerable schneider 50 1.9 Xenon as a 6/4....
Either way as long as it produces a good image, it doesnt matter. I believe from Ken Rockwells site that my older Nikon P is a single coated version of the 105 pc. _________________ A7R4, GFX50R and a bucket of mflenses |
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