BenQ MX812ST, MW811ST user manual Obtaining a preferred projected image size, Projection dimensions

Obtaining a preferred projected image size

The distance from the projector lens to the screen, the zoom setting, and the video format each factors in the projected image size.

Projection dimensions

Refer to "Dimensions" on page 73 for the center of lens dimensions of this projector before calculating the appropriate position.

•MX713 ST/MX762 ST

Screen Size

Vertical offset

Screen

Center of lens

Projection distance

	Screen size			Distance from screen
Diagonal					Vertical offset (mm)
		W (mm)	H (mm)	(mm)
Inch	mm
40	1016	813	610	494	91
50	1270	1016	762	617	114
60	1524	1219	914	741	137
80	2032	1626	1219	988	183
100	2540	2032	1524	1235	229
120	3048	2438	1829	1481	274
150	3810	3048	2286	1852	343
200	5080	4064	3048	2469	457
220	5588	4470	3353	2716	503
250	6350	5080	3810	3086	572
300	7620	6096	4572	3704	686

For example, if you are using a 120-inch screen, the recommended projection distance is 1481 mm and the vertical offset is 274 mm.

If your measured projection distance is 1.0 m (1000 mm), the closest match in the "Distance from screen (mm)" column is 988 mm. Looking across this row shows that a 80'' (about 2.0 m) screen is required.

Positioning your projector 15