Author Topic: How to get non-AI Nikkors converted?  (Read 11517 times)

gryphon1911

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Re: How to get non-AI Nikkors converted?
« Reply #60 on: September 19, 2017, 18:52:16 »
Andrew, it is definitely well worth the effort to get them converted.  It is not as if this three lenses are particulary unique or rare lenses. 

But why pay to have them converted - learn to modify them yourself - there are a number of examples on this site as to how it is done.  Good luck.

I think the last thing that any Nikon lens wants is my ham fisted mitts going to town on them.  I'd rather pay a bit of money and have someone with the proper skill and tools to do it.

I'll try and find the example on the site an see...but my initial thought is that I am ill equipped to do the deed.  :D
Andrew Livelsberger

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Roland Vink

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Re: How to get non-AI Nikkors converted?
« Reply #61 on: September 19, 2017, 22:59:07 »
Before you let anyone put a file to your aperture rings, see if there are any new old stock aperture rings still available. Some suppliers listed here: http://photosynthesis.co.nz/nikon/aimod.html#new
Aztech Services have (or had) a large range of AI conversion kits that I have not seen elsewhere.

basker

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Re: How to get non-AI Nikkors converted?
« Reply #62 on: September 20, 2017, 00:46:25 »
I hear bold claims about 3D printers. Would an AI conversion ring be a candidate for output? Since it is plastic you could call it current technology.  :)
Sam McMillan

Roland Vink

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Re: How to get non-AI Nikkors converted?
« Reply #63 on: September 20, 2017, 01:38:48 »
Interesting idea. Pre-AI, AI and AIS aperture rings are made from Aluminium alloy, and the tolerances are quite fine. Would a plastic replacement made with a 3D printer be strong enough and have sufficient precision? Series-E and AF lenses have plastic aperture rings, so it might be possible.

basker

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Re: How to get non-AI Nikkors converted?
« Reply #64 on: September 20, 2017, 03:45:20 »
 
...Would a plastic replacement made with a 3D printer be strong enough and have sufficient precision? Series-E and AF lenses have plastic aperture rings, so it might be possible.

In casual reading I see 100 micron tolerance claimed. The finish is not especially attractive, but there seems to be remedies for that. You would need a UV resistant plastic that is not too brittle. Seems like injection molded plastic would be better except for the tooling cost.

Modification is not that expensive or hard to find, but I am reluctant to commit the original ring.
Sam McMillan

Hugh_3170

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Re: How to get non-AI Nikkors converted?
« Reply #65 on: September 20, 2017, 05:30:58 »
No matter how the lenses are converted, the effort is well worth it, especially if one is using cameras such as the D500, Df, D8xx,  etc  that have an aperture follower tab that can engage with the ridge or tab that the conversion process provides or creates on the diaphragm /aperture ring. 

I agree that finding a factory made Ai ring that suits the lens in question is the ideal situation, but these are getting harder to find and modifying the existing ring is often the only option.
Hugh Gunn

Jack Dahlgren

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Re: How to get non-AI Nikkors converted?
« Reply #66 on: September 20, 2017, 06:32:37 »
Seems like some of the online 3D printers could recreate conversion rings given an accurate 3D model.
For example shapeways prints in aluminum (along with other metals)
https://www.shapeways.com/materials/aluminum.
Anyone have an out of stock conversion ring to try?

Bjørn Solberg

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Re: How to get non-AI Nikkors converted?
« Reply #67 on: September 28, 2017, 17:08:49 »
Hi Peter in Los Alamos, sorry for late reply, but I had to wait for proper screwdriver. But here are pictures of todays Ai conversion of  55mm 3.5 - 32 Micro Nikkor - P serial 713439.

As you can see, in a sophisticated workshop, an adjusted sofaleg can really do the trick. I rinse the ring(and my hands) well in hot running water after visiting "Emil i Lönnebergas snickarboden".

I spray some black paint on a sheet of paper, and use a Q tip to put some paint on the ring after.

More questions? Just ask.

Bjørn Rørslett

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Re: How to get non-AI Nikkors converted?
« Reply #68 on: September 28, 2017, 17:20:07 »
An ingenious lens aperture ring clamp for sure :D

The electricity setup in that tool shed appears a little on the rickety side, though ...

Peter

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Re: How to get non-AI Nikkors converted?
« Reply #69 on: October 09, 2017, 07:33:31 »
Hey I do about the same thing, had my local machine shop mill mine for $10.00 each they managed to bend my 105mm K lens ring I had to lightly tap it with a piece of wood still a tad out of round but has not given me any issues. The Nikkor-H 85mm f1.8 came out perfect. I wanted to keep these two lenses clean looking. But for some tosser lenses I break out the hack and file and Testors model paint and shoot away.

richardHaw

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Re: How to get non-AI Nikkors converted?
« Reply #70 on: October 12, 2017, 05:29:23 »
had my local machine shop mill mine for $10.00 each they managed to bend my 105mm K lens ring
:o :o :o
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