Older Nikon lens on my D7100 (Page 3): Some of use are old enough to have bought them new and didn't get rid of them. Some of them are actually quite good optically. The conversion...

therwol Loc: USA

lamiaceae wrote:

Just avoid Pre-AI lenses.

Some of use are old enough to have bought them new and didn't get rid of them. Some of them are actually quite good optically. The conversion isn't so expensive. I wouldn't make a new purchase of one except maybe to use on a vintage camera if I were into that.

Chris T Loc: from England across the pond to New England

User ID wrote:

Presence of the "saddle" does not br in... (show quote)

Very helpful, User … thanks, so much!

richardsaccount

Chief Rob wrote:

You may want to check out:
AI Conversions by John White at www.aiconversions.com
I just checked the web address and it is working.
Chief Rob

I agree with you. John White is the way to go. I believe that I paid $25.00 plus shipping. He modified a non-AI 24mm Nikkor that I use as a 35mm equivalent lens on my D7100.I think he will install a CPU for $10.00 more. Turnaround time was quick. He is in Ann Arbor Michigan and I am in the greater Cleveland Ohio area. We're neighbors.

Chris T Loc: from England across the pond to New England

therwol wrote:

Some of use are old enough to have bought them new and didn't get rid of them. Some of them are actually quite good optically. The conversion isn't so expensive. I wouldn't make a new purchase of one except maybe to use on a vintage camera if I were into that.

I have an older f2.5 105 Micro Nikkor with the AI ring, I have tried on BOTH my D7000 and D7100 - to absolutely no avail. Sounds like I could actually use it on them, with some kind of conversion - huh?

therwol Loc: USA

Chris T wrote:

I have an older f2.5 105 Micro Nikkor with the AI ring, I have tried on BOTH my D7000 and D7100 - to absolutely no avail. Sounds like I could actually use it on them, with some kind of conversion - huh?

Can you be specific? Does it mount properly? Did you enter the non-CPU lens data into the camera as I showed in this thread with screenshots from the manual?

Also what version do you have, pre-AI, AI or AIs?

Chris T Loc: from England across the pond to New England

therwol wrote:

Can you be specific? Does it mount properly? Did you enter the non-CPU lens data into the camera as I showed in this thread with screenshots from the manual?

Also what version do you have, pre-AI, AI or AIs?

I don't actually know, Therwol. I bought it back in the 70s - for my original Nikon F and F2. It works fine on my Nikkormat EL and on my FG, but, it's pretty useless on all five of my Nikon DSLRs. All I get is this big circular blob of light. How can you tell which version you have?

Just took some pics of it with the D7100 w/ 16-85 VR - both, on my D7000, and off. Will post, shortly.

therwol Loc: USA

Chris T wrote:

I don't actually know, Therwol. I bought it back in the 70s - for my original Nikon F and F2. It works fine on my Nikkormat EL and on my FG, but, it's pretty useless on all five of my Nikon DSLRs. All I get is this big circular blob of light. How can you tell which version you have?

Use this chart. It will also indicate whether the lens is already AI or AIS by serial number, and if you click on the lens, you'll get a photo that you can match with yours.

http://www.photosynthesis.co.nz/nikon/serialno.html

A big circular blob may have nothing to do with the aperture ring.

Chris T Loc: from England across the pond to New England

therwol wrote:

Use this chart. It will also indicate whether the lens is already AI or AIS by serial number, and if you click on the lens, you'll get a photo that you can match with yours.

http://www.photosynthesis.co.nz/nikon/serialno.html

A big circular blob may have nothing to do with the aperture ring.

That's a pretty comprehensive chart, there, Therwol. Did you make that?

Unfortunately, though - there is NO 105 f2.5 Micros on it - just f2.8 and f4 ones. It closes down to f32.
Does that help?

Waiting for the D7100 to set up the off-load procedure on this PC - when it finishes, I'll show you the pics!

adamsg Loc: Chubbuck, ID

Along that line of thought, if I were to have the modification made to my non-AI lens, would that render it ineffective or inoperative when used on my Nikon F body? My F is in great condition and I still would like to shoot some with it.

Bill_de Loc: US

Chris T wrote:

That's a pretty comprehensive chart, there, Therwol. Did you make that?

Unfortunately, though - there is NO 105 f2.5 Micros on it - just f2.8 and f4 ones. It closes down to f32.
Does that help?

Waiting for the D7100 to set up the off-load procedure on this PC - when it finishes, I'll show you the pics!

Possibly because Nikon, although they made a 105 F/2.5, I don't think they made a 'micro' 105 F/2.5

----

Bill P

[quote=adamsg]therwol: A BIG, BIG thank you for the warning. I now need to learn how my lens could be modified, if that is at all possible.

It is indeed possible. I had a local repairman do mine. Hew was, when there was such a thing, a factory authorized repair business for Nikon, after the factory stopped supplying replacement rings, he took the ring off, filed out a bit, and it was done.

User ID

Chris T wrote:

I have an older f2.5 105 Micro Nikkor with the AI ring, I have tried on BOTH my D7000 and D7100 - to absolutely no avail. Sounds like I could actually use it on them, with some kind of conversion - huh?

The OTHER protuberances on the rear .... the
matte black stuff ... collides with shapes in the
mirror box of some digital Nikons.

If you can loosen the three chromed screws
that retain the whole round black baffle panel,
you can remove it and leave it off. You'll hafta
put back the one screw with the bigger head
into the correct hole so that the lens stops in
the correct position when you mount it.

If you lose that special screw you can still use
lens but need to be careful mounting it.

.

BebuLamar

Back in the days Nikon would modify your Pre-AI lenses to AI lenses for something like $10 or $20 each. The conversion was very well done by replacing the entire aperture ring. However, I see very few of those factory converted lenses today. I guess people who owned pre AI cameras didn't upgrade to the AI cameras a lot.
While AI cameras don't use the meter coupling prong that AI cameras used but the AI lenses do have them. The prong on AI lenses are different though. They are hollowed out so that light can reach the secondary aperture ring so you can see the aperture number in the viewfinder. So it's quite easy to identify Pre-AI vs AI lenses by looking at the prong.

LMurray Loc: North Orange County, CA

User ID wrote:

Especially at 58mm .... was there
ever an Ai version of 58mm ?

The Noct 58mm f1.2 is AI-AIS. In addition you can tell AI-AIS by if the prong has 2 holes 1 on either side of the slot in the middle, and the smallest apperature number is orange, also there's a second row of aperature numbers behind the prong that make the numbers visable when looking looking into the viewfinder.

Architect1776 Loc: In my mind

adamsg wrote:

Along that line of thought, if I were to have the modification made to my non-AI lens, would that render it ineffective or inoperative when used on my Nikon F body? My F is in great condition and I still would like to shoot some with it.

A non-AI lens modified to work with AI bodies will still work with your F body just fine.