It's a 0.7:1 short-throw, so it'll do a large projection even in a small room. To explain what that means, I put the projector 7 feet away from the wall and the projection is 10 foot wide in either 16:9 or 16:10 setting. At 16:10 aspect ratio setting from that distance, we're talking about a 76" projection height (which is basically a full wall projection with a foot above and below not having projection). Not sure on the diagonal size, but we're talking huge.
Not everyone wants 10 foot wide projection. Most go with a mount 4-6 foot away from the wall. Short-throw ensures that HUGE home theater experience. It's fun with NVIDIA 3D Vision wall sized like that because you're basically gaming life sized with 3D depth. I love to go with a big immersive projection, while some people don't like that, the option is always there to mount the projector closer to the wall.
To get better numbers for your application, I suggest looking up Optoma GT700 or GT720 in Projector Central's Projector Calculator Pro. It'll give you pretty accurate idea on just what size of a projection you'd get at what distance.
okay thanks..well i have about 9.33 feet width wise to my room ... according to the calculator you gave me, the actually screen size would be 144" diagonally and a 122" wide..if i used my full 9.33 feet
122" is about 1 of my walls which is way too big..i mean way to big for my small room
if i bring it up to 4.5 Feet its smaller but still 6 feet wide.
can you recommend any projector that can produce a smaller screen size? that are around 700$ and do atleast 720p?.