BenQ MX520 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 55 for the center of lens dimensions of this projector before calculating the appropriate position.

Maximum zoom	Minimum zoom
			Screen
H	H		Center of lens
Diagonal	Diagonal
W	W	Vertical offset	Projection distance

MX520

The screen aspect ratio is 4:3 and the projected picture is 4:3

	Screen size			Projection distance (mm)
Diagonal				Min		Max	Vertical
		W	H	distance		distance	offset
					Average
Inch	mm	(mm)	(mm)	(max.		(min.	(mm)
				zoom)		zoom)
30	762	610	457	1132	1189	1245	46
40	1016	813	610	1509	1585	1660	61
50	1270	1016	762	1887	1981	2075	76
60	1524	1219	914	2264	2377	2491	91
80	2032	1626	1219	3019	3170	3321	122
100	2540	2032	1524	3774	3962	4151	152
120	3048	2438	1829	4528	4755	4981	183
150	3810	3048	2286	5660	5943	6226	229
200	5080	4064	3048	7547	7925	8302	305
220	5588	4470	3353	8302	8717	9132	335
250	6350	5080	3810	9434	9906	10377	381
300	7620	6096	4572	11321	11887	12453	457

For example, if you are using an 120-inch screen, the recommended projection distance is 4755 mm and the vertical offset is 183 mm.

If your measured projection distance is 6.0 m (6000 mm), the closest match in the "Projection distance (mm)" column is 5943 mm. Looking across this row shows that a 150'' (about 3.8 m) screen is required.

14 Positioning your projector