BenQ MX820ST, MX819ST, MX818ST 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 56 for the center of lens dimensions of this projector before calculating the appropriate position.

MX818ST/MX819ST

(a)

Screen

Center of lens

(c)

(b)

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

	(a) Screen size			(b) Distance from screen	(c) Vertical offset
Diagonal		Height	Width
				(mm)	(mm)
Inches	mm	(mm)	(mm)
80	2032	1219	1626	988	183
100	2540	1524	2032	1235	229
120	3048	1829	2438	1481	274
150	3810	2286	3048	1852	343
180	4572	2743	3658	2222	411
200	5080	3048	4064	2469	457
220	5588	3353	4470	2716	503
240	6096	3658	4877	2963	549
270	6858	4115	5486	3333	617
300	7620	4572	6096	3704	686

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

If your measured projection distance is 2.5 m (2500 mm), the closest match in the "(b) Distance from screen" column is 2469 mm. Looking across this row shows that a 200'' (about 5.1 m) screen is required.

Positioning your projector 15