Started Jul 21, 2013 | Discussions thread
Cerumen Senior Member • Posts: 1,912
Re: AI vs AIS

I think the AIS version is the only one with close range correction (CRC). This statement from the well-regarded MIR website supports this:

"For many, it represented the best value in the line up. In its AIS form, the optical design was formidable, featuring CRC and a minimum focus distance of 0.2m. It is reputed to be one of the sharpest wide angle Nikkors, and remains in production as of 2008, along with its less impressive AF successor. The lens also excels in macro photography when reversed, providing for up to 9x magnification."

Certainly, there are quite a few Nikon lenses that had no optical changes when transitioning from the AI to AIS mount, but some were tweaked for their re-release.

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