BenQ MX722 user manual Obtaining a preferred projected image size, Projection dimensions, Offset

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 57 for the center of lens dimensions of this projector before calculating the appropriate position.

Maximum zoom Minimum zoom

	Screen
	Center of lens
Vertical offset	Projection distance

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

	Screen size			Distance from screen (mm)			Vertical
Diagonal				Min length		Max length
		W	H				offset
Inch	mm	(mm)	(mm)	(max.	Average	(min. zoom)	(mm)
				zoom)
40	1016	813	610	1231	1415	1600	46
50	1270	1016	762	1538	1769	2000	57
60	1524	1219	914	1846	2123	2400	69
70	1778	1422	1067	2154	2477	2800	80
80	2032	1626	1219	2462	2831	3200	91
90	2286	1829	1372	2769	3185	3600	103
100	2540	2032	1524	3077	3538	4000	114
120	3048	2438	1829	3692	4246	4800	137
150	3810	3048	2286	4615	5308	6000	171
200	5080	4064	3048	6154	7077	8000	229
250	6350	5080	3810	7692	8846	10000	286
300	7620	6096	4572	9231	10615	12000	343

For example, if you are using an 120-inch screen, the recommended projection distance is 4246 mm and the vertical offset is 137 mm.

If your measured projection distance is 5.0 m (5000 mm), the closest match in the "Distance from screen (mm)" column is 5308 mm. Looking across this row shows that a 150'' (about 3.8 m) screen is required.

All measurements are approximate and may vary from the actual sizes.

BenQ recommends that if you intend to permanently install the projector, you should physically test the projection size and distance using the actual projector in situ before you permanently install it, so as to make allowance for this projector's optical characteristics. This will help you determine the exact mounting position so that it best suits your installation location.

Positioning your projector 15