Hi--

> I saw a post with your name on it. Could you tell me if there are any
>differences in optical quality between the Nikon 50mm f1.2 AI vs. AIS?
>I'm trying to buy one. New, one can only get AIS. Someone suggested that
>the AI lens might be better (?)

No, no difference... BTW, see my Nikon list on my web page,
under "I babble"...

>Also, is there any difference between the 50mm 1.4 and the 1.2
>optically? One review rated the 1.4 at 4.5/5 and the 1.2 at 5/5 between
>4-15 feet.

Oh, you have been there...! ;-)
The f1.2 is specialized - really excellent over its best
focus range, not very good at greater distances. The optically different
f1.4 from about f2 is a better lens for general use, with the f1.8
a bit better yet in its versatility. Speed comes at a price.

>Appreciate your help!
>
>Howard Posner M.D.

You're welcome!