BenQ MX880UST 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.

For example, if you are using an 120-inch screen, the recommended projection distance is 715 mm and the vertical offset is 320 mm.

If your measured projection distance is 0.9 m (900 mm), the closest match in the "Distance from Screen in mm" column is 902 mm. Looking across this row shows that a 150'' (about 3.8 m) screen is required.

Projection dimensions

Refer to "Dimensions" on page 69 for the center of lens dimensions of this projector before calculating the appropriate position.

Screen Size

							Screen
								Center of lens
			Vertical offset
						Projection distance
	Screen Size				Distance from Screen in mm					Vertical offset in mm
Diagonal		W		H
Inches	mm	(mm)		(mm)
70	1778	1422		1067	404				186.7
80	2032	1626	1219		467				213.4
90	2286	1829	1372		529				240.0
100	2540	2032	1524		591				266.7
120	3048	2438	1829		715				320.0
150	3810	3048	2286		902				400.1
200	5080	4064	3048		1213				533.4
220	5588	4470	3353		1337				586.7
240	6096	4877	3658		1462				640.1

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