Positioning The Projector - InFocus IN20 Series Reference Manual

Positioning the projector

To determine where to position the projector, consider the size and shape of
your screen, the location of your power outlets, and the distance between
the projector and the rest of your equipment. Here are some general guide-
lines:
• Position the projector on a flat surface at a right angle to the screen. The
projector must be at least 4.9 feet (1.5m) from the projection screen.
• Position the projector within 10 feet (3m) of your power source and
within 6 feet (1.8m) of your video device (unless you purchase exten-
sion cables). To ensure adequate cable access, do not place the projector
within 6 inches (.15m) of a wall or other object.
• If you are installing the projector on the ceiling, refer to the installation
guide that comes with the Ceiling Mount Kit for more information. To
turn the image upside down, see "Ceiling" on page 31. We recommend
using an InFocus authorized ceiling mount.
• Position the projector the desired distance from the screen. The distance
from the lens of the projector to the screen, the zoom setting, and the
video format determine the size of the projected image.
• The image exits the projector at a given angle. This image offset is
112.2%. This means that if you have an image 10' high, the bottom of
the image will be 1.12' above the center of the lens.
Table 1:
Range of distance to the screen for a given screen size
Distance to screen
Diagonal Maximum
Screen Size distance
(inches/m) (feet/m)
60/1.5 8.5/2.5
80/2 11.3/3.4
92/2.3 13.0/3.9
150/3.8 21.2/6.4
10 ft high
image
bottom of image
1.12 ft above center
of lens
5
Minimum
Distance
(feet/m)
7.9/2.4
10.6/3.2
12.2/3.7
19.8/6.0
Projection angle
lens center