NikonGear'23

Gear Talk => What the Nerds Do => Topic started by: richardHaw on September 22, 2019, 18:36:20

Title: Nikkor-UD repair!
Post by: richardHaw on September 22, 2019, 18:36:20

https://richardhaw.com/2019/09/22/repair-nikkor-ud-20mm-f-3-5-auto/
 :o :o :o

Title: Re: Nikkor-UD repair!
Post by: mxbianco on September 23, 2019, 19:17:15

Quote from: richardHaw on September 22, 2019, 18:36:20

https://richardhaw.com/2019/09/22/repair-nikkor-ud-20mm-f-3-5-auto/
 :o :o :o

That is a huge amount of work, kudos for the exhaustive photographic documentation. I have added the link to my bookmarks, just in case I have to disassemble my own sample (fortunately no need to do anything). Well, my sample is not AI converted, and from Roland's database there is no mention of an AI-conversion kit in the 4th lens batch (my serial is 476xxx), to convert it i will have to machine the aperture ring... unless Roland suggests that kits 19 or 20 are fine with my sample (btw, hard to find anywhere!)

Ciao from Massimo

Title: Re: Nikkor-UD repair!
Post by: Roland Vink on September 24, 2019, 11:18:01

The 4th batch uses AI kit 20. To avoid repetition, I only list the AI kit against the earliest batch, following batches should used the same kit unless another one is specified, or the lens is AI :)

Title: Re: Nikkor-UD repair!
Post by: mxbianco on September 24, 2019, 11:45:34

Quote from: Roland Vink on September 24, 2019, 11:18:01

The 4th batch uses AI kit 20. To avoid repetition, I only list the AI kit against the earliest batch, following batches should used the same kit unless another one is specified, or the lens is AI :)

Thanks, Roland. Will remember this convention for future lookups in your super database!

Ciao from Massimo

Title: Re: Nikkor-UD repair!
Post by: Erik Lund on September 24, 2019, 14:25:30

Thanks Rick! There is so much materiel in that lens wow,,, compared to the tiny 20mm f/3.5 Ais  :o ::)

Kit # 19 is available:
https://kamerastore.com/products/search-Conversion%20kit%2019/ (https://kamerastore.com/products/search-Conversion%20kit%2019/)

Title: Re: Nikkor-UD repair!
Post by: mxbianco on September 24, 2019, 15:33:51

Quote from: Erik Lund on September 24, 2019, 14:25:30

...
Kit # 19 is available:
https://kamerastore.com/products/search-Conversion%20kit%2019/ (https://kamerastore.com/products/search-Conversion%20kit%2019/)

Thanks, Erik! Unfortunately as Roland says, I need AI kit #20...
But thanks to this thread I've pulled the UD-Nikkor out of a cabinet and started looking at it, and found out the following (tested on an old D300):

• It's not necessary to machine out any metal, only the rabbit ears have to be turned 180°, or removed altogether (if you don't want to use it on a vintage Nikon F/F2)
• Naturally, a small piece of metal will have to be screwed on or glued at the appropriate position for f/3.5 to act as an AI-coupling ridge

So AI conversion in this case is really easy!

Ciao from Massimo