At 06:49 PM 3/17/97 -0800, you wrote:
>>??? I meant the rear glass lens element - it is BIG in the newer version,
>>and unmistakeable... Bob is in the house, with the e-mail account, hence
>>my nom de plume of "Hope This Helps" (saves $250/year duplicating a
>>service already here...;-)
>>David Ruether
>
>Over the WE I became an expert on the Nikkor 105mmm f:2.5, MF, looking in
>various books. I wanted to find a safe way to describe a later one on the
>phone (everybody would say, well, yes, the rear element is pretty big,
>about 1-1.5 inches...). Here is what I found in case you are interested:
>
>4 versions:
>
>- non-AI, s/n 120102-253907, min. apert.22, min. distance 1.2 meter,
>optical formula 5/3, chrome barrel, filter ring black or chrome. Production
>from '59 to '71. The early one, retro-looking.
>
>- non-AI, s/n 407301-571564, min apert. 32, min. distance 1.0, optical
>formula 5/4, black barrel and filter ring. Production from '70 to '75. The
>later one, with the large rear element.
>
>- AI, s/n from 673101, otherwise same as precedent except min. apert. 22,
>production '74 to '81.
>
>- AIS, s/n from 890001, otherwise same as precedent, production from '81.
>
>Thanks again for your help, David.
>
>Phil philduke@leland.Stanford.EDU (Philippe Ducor)