5
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 guidelines:
•
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.
•
For safety reasons, position the projector within 10 feet (3m) of your
power source (running extension cables may introduce a trip hazard).
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 26. 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 offset is 128% for the IN72. This means that if you have an
image 10’ high, the bottom of the image will be 2.8’ above the center of
the lens. For the IN74 and IN76, the image offset is 115%.
NOTE
: Visit the Service section of our website at www.infocus.com/calcu-
lator for an interactive image size calculator.
bottom of image
2.8 ft above center
10 ft high
image
Projection angle in 16:9 mode
lens center
of lens
Table 1:
Range of distance to the screen for a given screen size
for the IN72
Diagonal
Screen Size
(inches/m)
Distance to screen
Maximum
distance
(feet/m)
Minimum
Distance
(feet/m)
60/1.5
9.3/2.8
7.8/2.4
80/2
12.3/3.8
10.4/3.2
92/2.3
14.2/4.3
12/3.7
150/3.8
23.1/7
19.5/5.9
Table 2:
Distance to the screen for a given screen size for the
IN74/IN76
Diagonal
Screen Size
(inches/m)
Distance to screen
Maximum
distance
(feet/m)
Minimum
Distance
(feet/m)
60/1.5
8.3/2.5
6.6/2
80/2
11.1/3.4
8.8/2.7
92/2.3
12.8/3.9
10.1/3.1
150/3.8
20.8/6.3
16.4/5
