Panasonic ET-DLE035 Ultra Short Throw Lens 0.38:1

Keep the measurements in the same units, feet or meters - it does not matter - just keep them the same!  | Aspect ratio 4:3 or 16:9, it does not matter. Using the screen width assumes this is the largest dimension of the screen. | Throw distance is calculated from the projector lens to the screen.  | 1 metre = 3.2808399 feet