How Far Back Does a Projector Need to Be for a 120 Inch Screen?
Ideal Projector Distance Calculation For a 1.5:1 throw ratio and 10 foot diagonal 120-inch screen, multiply ratio by diagonal to get 15 feet optimal throw distance. Projectors with short throw ratios need less distance for large images. A 1.2-1.5:1 ratio means 1.2-1.5 x image width equals throw distance. For a 120 inch wide screen, throw … Read more