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Non-AI compatibility question with AF bodies

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Zip Basic Member
Thu 07-Nov-02 01:35 AM

have a question regarding non-AI lenses & AF bodies

I have an opportunity to purchase a Vivitar Series 1 90mm f2.5 macro (a lens which I used to use in my pre-Nikon days and was quite impressed with) in a Nikon mount (but non-AI). I plan to use it with an N90 & F100 (and maybe next year an FM3a). I understand that, of course, AF is not part of this lens, and have looked through some of the archives saying non-AI'd lenses are not compatible, but was curious as to why? Do I simply lose metering capability (having to stop down to meter) or are there other mechanical issues involved?

I sent a note to someone who was mentioned in the archives as doing AI conversions, just wondering if this is opening a can of worms, or if I should hold off till spring and maybe get a 105 micro-nikkor. The 90 was a sweet lens though, has anyone had good luck with converted non-AI lenses on newer AF bodies?

Thanks all for the input, great source of info this place!


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