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18
Adjusting the Projector’s Focus
Focus Ring
ViewSonic
MENU
LAMP
SOURCE
TEMP
To focus the image, rotate the focus ring until the image is clear.
Adjusting Projection Image Size
Refer to the graphics and table show as below to determine the screen size and
projection distance.
y Adjusting the vertical image position
Projection Distance
Lens Center
Screen
Projection distance (m) = 1.4 x Screen size (m) x 0.848
Ex.: Projection distance (0.9m)=1.4 x Screen size (0.76) x 0.848
Tolerance is around 5%
Projection Distance Screen Size (16:10)
Inch m Inch m
35.4 0.9 30 0.76
39.4 1.0 33 0.84
47.2 1.2 40 1.02
51.2 1.3 43 1.09
63 1.6 53 1.35
74.8 1.9 63 1.60
86.6 2.2 73 1.85
94.5 2.4 80 2.03
This table is for user’s reference only.