Author Topic: micro-nikkor 105mm f/4 Ai-S!!!  (Read 787 times)

richardHaw

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micro-nikkor 105mm f/4 Ai-S!!!
« on: March 04, 2021, 14:33:20 »
https://richardhaw.com/2021/03/04/repair-micro-nikkor-105mm-f-4-ai-s/

quite good but not as good as I was expecting it to be :o :o :o

Erik Lund

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Re: micro-nikkor 105mm f/4 Ai-S!!!
« Reply #1 on: March 04, 2021, 15:46:48 »
Thank you!
Good timing, we where talking a lot about this lens lately.

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richardHaw

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Re: micro-nikkor 105mm f/4 Ai-S!!!
« Reply #2 on: March 04, 2021, 15:50:55 »
Thank you!
Good timing, we where talking a lot about this lens lately.
oh? where? ill go look for it :o :o :o

Erik Lund

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Re: micro-nikkor 105mm f/4 Ai-S!!!
« Reply #3 on: March 04, 2021, 15:52:14 »
It's mentioned several times in this thread
https://nikongear.net/revival/index.php?topic=9867.0
I have added a link back to here as well

Erik Lund

richardHaw

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Re: micro-nikkor 105mm f/4 Ai-S!!!
« Reply #4 on: March 04, 2021, 15:52:39 »
oh, i found another one :o :o :o

Gerhard2006

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Re: micro-nikkor 105mm f/4 Ai-S!!!
« Reply #5 on: March 05, 2021, 00:27:11 »
How does it compare to the 105 2.8 Ais micro Nikkor?

richardHaw

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Re: micro-nikkor 105mm f/4 Ai-S!!!
« Reply #6 on: March 05, 2021, 00:33:44 »
How does it compare to the 105 2.8 Ais micro Nikkor?

i find it sharper :o :o :o

MEPER

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Re: micro-nikkor 105mm f/4 Ai-S!!!
« Reply #7 on: March 06, 2021, 09:18:31 »
You write you got this lens as "junk"?
What was the initial problem with lens since it was sold as "junk"?
I believe that there was no scratches on lenses as this is not easy to repair and the lens appears to look good from outside....not many scratches on barrel etc.....
What is the most common problems with Nikkors you buy as "junk"?     oil on aperture blades?     haze?      ...maybe fungus?

richardHaw

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Re: micro-nikkor 105mm f/4 Ai-S!!!
« Reply #8 on: March 06, 2021, 14:21:56 »
You write you got this lens as "junk"?
What was the initial problem with lens since it was sold as "junk"?
I believe that there was no scratches on lenses as this is not easy to repair and the lens appears to look good from outside....not many scratches on barrel etc.....
What is the most common problems with Nikkors you buy as "junk"?     oil on aperture blades?     haze?      ...maybe fungus?
this one has a very small scratch on the front glass :o :o :o
it also has many scratches

usually fungus, bad helicoid grease, figgy glass balsam, ugly barrel, etc. ::)

MEPER

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Re: micro-nikkor 105mm f/4 Ai-S!!!
« Reply #9 on: March 06, 2021, 14:31:05 »
Have you ever used another lens as donor for the glass elements?
Taking a glass element from one lens (same type of course) to repair the other?
Is that possible or are the individual lens elements hand selected for a specific lens so you will get less performance if you swap lens elements?
If you get another 105/4 as junk the lens element that has a scratch may be ok in the other?

richardHaw

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Re: micro-nikkor 105mm f/4 Ai-S!!!
« Reply #10 on: March 06, 2021, 15:58:14 »
Have you ever used another lens as donor for the glass elements?
Taking a glass element from one lens (same type of course) to repair the other?
Is that possible or are the individual lens elements hand selected for a specific lens so you will get less performance if you swap lens elements?
If you get another 105/4 as junk the lens element that has a scratch may be ok in the other?

it sometimes wont work :o :o :o

some were indeed hand selected ::)

i tried this a few times

MEPER

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Re: micro-nikkor 105mm f/4 Ai-S!!!
« Reply #11 on: March 06, 2021, 16:30:00 »
This may also be the reason why there can be some sample variation between the cheaper mass produced lenses.......they probably don't spend time to optimize every lens.....
All the reviews I read about the Nikkor 200-500 zoom.....the review'er tried several before getting a good one.....but then it seems to be very good......

To use a donor glass element.....you could maybe also be lucky to get a "one in a lifetime lens" :-)

David H. Hartman

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Re: micro-nikkor 105mm f/4 Ai-S!!!
« Reply #12 on: March 06, 2021, 20:05:10 »
quite good but not as good as I was expecting it to be :o :o :o

Richard, you mention spherical aberration wide open at f/4.0. Please correct me if I'm wrong but I associate some under correction of spherical aberration with good bokeh. Nikkor - The Thousand and One Night mentions that spherical aberration is under corrected at portrait distances and wide apertures in the 105/2.5 AI (Xenotar type) and this is what makes defocused backgrounds appeared beautiful. A friend owned a 105/4.0 AI Micro-Nikkor and said it made a good portrait lens noting good bokeh at f/4.0.

How does it compare to the 105 2.8 Ais micro Nikkor?

Using the 105/2.8 AIS between 1:2 and 1:1 is complicated as this lens has CRC or floating elements. The lens should be kept at its minimum focus position and as little extension used to achieve the desired image ratio. One could use a PK-12 then PK-13 then both before using a PN-11. I wonder if anyone bothers to do this? There are suggested maximum apertures to use engraved on the barrel of the 105/2.8 AIS Micro. I believe this is for edge sharpness. It's easier to use the 105/4.0 AI or AIS and use the PN-11 to go from 1:2 to 1:1 as the 105/4.0 Micro is a unit focusing lens with no CRC.

---

I bought a 105/4.0 AI Micro-Nikkor as soon as it was released but returned it. I was pretty green. I used a PK-13 tube and took photos of bees at 1:1.3 and marked f/32. The results were quite soft. I believe this is an effective f/57. Even then I probably knew better than to use f/45~f/64 with 4x5 due to diffraction. Years later I bought a friend's 105/4.0 AI Micro-Nikkor. I've only used it with a PN-11.

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My thoughts renegading the 105/2.8 AIS Micro v. 105/4.0 AI/AIS Micro are use the 105/2.8 for a general 105mm, a portrait lens and close-up to 1:2. Use the 105/4.0 AI and AIS Micro as a general 105mm lens, portrait lens and 1:2 to 1:1 and beyond.

Dave
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richardHaw

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Re: micro-nikkor 105mm f/4 Ai-S!!!
« Reply #13 on: March 07, 2021, 03:07:34 »
yes but this is a macro lens so id rather not see it :o :o :o

i looked at my results from the 2.8, the 5 really is sharper ::)

David H. Hartman

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Re: micro-nikkor 105mm f/4 Ai-S!!!
« Reply #14 on: March 07, 2021, 05:44:54 »
yes but this is a macro lens so id rather not see it :o :o :o

i looked at my results from the 2.8, the 5 really is sharper ::)

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