I'm a complete noob when it comes to lens.
I'm looking at 75-300mm lens to shoot moving cars (autocross and track) and other far distance moving objects.
I'm looking and I see alot of variation in price, for example:
http://www.nikonusa.com/Nikon-Produc...52F4-5.6G.html
versus
http://www.nikonusa.com/Nikon-Produc....6G-IF-ED.html