Adjusting The Projector's Focus; Adjusting Projection Image Size - ViewSonic Pro9000 User Manual

Adjusting the Projector's Focus

To focus the image, rotate the focus ring until the image is clear.

Adjusting Projection Image Size

How to optimize screen size and distance
Consult the table below to find the optimal screen sizes achievable when the
projector is positioned at a desired distance from the screen. Example: If the
projector is 2.5 m from the screen, good image quality is possible for image sizes
between 63" and 75".
Figure: Fixed distance with different zoom and screen size.
Follow the figure, the space of 109 cm height is required when located at 2.5 m distance.
Focus Ring
B
A
2.5 m
Desired Distance
18
Height: 109 cm
From base to
top of image
Height
91 cm
C