I sit 13.5' feet away from a 145" 2.35 1.0 gain screen. I moved back and forth many times and found that distance to be the best. Any closer and I felt like I was only focusing on the center of screen instead of the whole. I don't know how you can watch a 144" with only 11' away. You must be turning your head left and right to see the whole screen.
2/25/14 at 1:11pm