I have just began to invest in F2.8 Nikon lens. My first is the 80-200 2.8 ED-IF which I love. As I move forward to my next...35-70 2.8, I am questioning which lens are glass, and others plastic. I have not been able to glean this information from the Nikon lens charts. Can anyone provide a comprehensive listing of when plastic was introduced, and in which models plastic vs.. glass is applied. I also wonder whether glass provides better contrast. I'm aware that both the plastic and glass lens are coated. Regards Dan
