The projector's picture is always 16:9. Most golf screens are squarer than that (1:1 or 4:3), so a picture that fits the width only lights about half the height. Set the distance so the picture fills the height, then set the projector's Screen Fill to the screen's shape: the sides are blanked and the lit area matches the screen. If a screen is wider than 16:9, the width sets the distance instead; the calculator checks for that.

BenQ's projection tables and projector calculator. The AH500ST has a fixed 0.499 throw: distance = 0.499 × the width of the 16:9 picture, and the picture's bottom edge sits 12% of its height above the lens centre when the projector is level. The AH700ST and AK700ST have a 1.2× zoom (0.69 to 0.83), so they give a range of distances for the same picture. BenQ quotes a 5% optical tolerance and says to test the real projector before fixing anything.

Our packages ship the projector in a steel floor case between the mat and the screen, so nothing is fixed to the room and the case slides to the exact spot on the day. A ceiling mount puts the lens at the same distance overhead; the picture's offset then works downwards, so under a 2.7m ceiling a tall screen needs a small tilt and keystone. The enclosure arm holds the projector at the front of a 1.5m-deep SimSpace bay, which gives a smaller picture on a 2.3m-high screen; the calculator shows what you get there.

From the front of the lens to the face of the screen, straight down the middle of the screen. Add the depth of the projector body and the case or mount when you plan the floor or ceiling position.