Epson EpiqVision Ultra LS800 4000-Lumen Pixel-Shift 4K UHD Ultra-Short Throw Laser 3LCD Smart Home Theater Projector (Black) - Manual (Page 28)

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You can also use the Projection Distance Calculator here (U.S.), here (Canada), or here (Caribbean).
Note: You can use the Flexible Picture menu to reduce the projected image size and change the
position of the image without moving the projector.
1 Projection distance (from image to rear of projector)
2 Distance from top of projector to base of image
3 Distance from top of projector to top of image
16:9 Aspect Ratio Image or Screen
Screen or image size Projection distance (1) Offset from top of
projector (2) Offset from top of
projector (3)
80 inches (203.2 cm) 0.9 inches (2.3 cm) 4.3 inches (10.8 cm) 43.5 inches (110.4 cm)
90 inches (228.6 cm) 2.4 inches (6 cm) 5.1 inches (12.9 cm) 49.2 inches (124.9 cm)