I am very newbish when it comes to optics. I just had a question that im sure someone out there can assit me with. I am going to be using a 10.4" sharp lcd 1024x768 natvie (pulled from an ASK Impact WSX). I wanted to know what type of lens I would need If i wanted the lens to be roughly 7-8 feet away from the 60"x60" screen? I know there's some more math to determine a correct FL, but I just wanted a good starting point. Thanks