Hey all! I recently had the opportunity to purchase a Tamron F2.8 AF 90mm Non-Di lens ( fairly cheap, compared to a newer DI model). Now from what I was told this lens is basically the same thing as the DI model other than it is an older lens, and has a different coating on the glass. I have tried to find some stuff on it on the internet, but it has been spotty at best. Is anyone familiar with lens? From the limited information I have gotten, they seem to be a pretty sharp lens, and many people liked them. Any one have some input on it? I figure for $175 the lens looks brand new, and it seems really tempting. Thanks all!!