BenQ MX761 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 71 for the center of lens dimensions of this projector before calculating the appropriate position.

Maximum zoom Minimum zoom

Vertical offset

Screen

Center of lens

Projection distance

	Screen size			Distance from screen (mm)			Vertical offset
				Min		Max
Diagonal							(mm)
		W	H	length		length
					Average
Inch	mm	(mm)	(mm)	(max.		(min.	(min.)	(max.)
				zoom)		zoom)
40	1016	813	610	1143	1486	1829	30	91
50	1270	1016	762	1429	1857	2286	38	114
60	1524	1219	914	1714	2229	2743	46	137
80	2032	1626	1219	2286	2971	3657	61	183
100	2540	2032	1524	2857	3714	4571	76	229
120	3048	2438	1829	3429	4457	5486	91	274
150	3810	3048	2286	4286	5571	6857	114	343
200	5080	4064	3048	5714	7429	9143	152	457
220	5588	4470	3353	6286	8171	10057	168	503
250	6350	5080	3810	7143	9286	11429	191	572
300	7620	6096	4572	8571	11143	13714	229	686

For example, if you are using a 120-inch screen, the recommended projection distance is 4457 mm and the vertical offset is 91 mm - 274 mm.

If your measured projection distance is 5.0 m (5000 mm), the closest match in the "Distance from screen (mm)" column is 4457 mm or 5571 mm. Looking across this row shows that a 120'' (about 3.0 m) or 150'' (about 3.8 m) screen is required.

There is 3% tolerance among these numbers due to optical component variations. 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