Its county seat is San Antonio, the second-most populous city in Texas and the seventh-largest city in the United States. Bexar County is included in the San Antonio-New Braunfels, TX metropolitan statistical area. Bexar county includes Government Canyon state natural area in northwestern part of the county.
If the screen width is 7 feet and the projector's throw ratio is 2.0 - 2.4:1 (because projectors have zoom lenses, they also have a range of throw ratios) then you can place your projector anywhere from 14 to 16.8 feet away from the screen.
How to Calculate Projector Distance. Hereâs a couple of handy pieces of advice for setting up you backyard cinema. First and foremost, how far is too far? In other words, how to calculate the optimal distance between the projector and the screen? This is important because it will affect the quality of the picture. Too far will get you a too big and dim image, to close and you end up with an overly bright and too small an image.