6
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 guidelines:
• Position the projector on a flat surfac
e at a right angle to the screen. It must be
at least 48” (1.2m) from the projection screen.
• If you are installing the projector on the ceiling, we strongly r
ecommend using
InFocus approved ceiling mounts for proper fitting, ventilation and
installation. Refer to the installation guide that comes with the InFocus Ceiling
Mount Kit (p/n PRJ-MNT-UNIV) for more information. The warranty does
not cover any damage caused by use of non-approved ceiling mount kits or by
installing in an improper location. To turn the image upside down, see “Ceiling
mount” on page 26. We recommend using an InFocus authorized ceiling
mount.
• Position the projector the de
sired distance from the screen. The distance from
the lens of the projector to the screen and the video format determine the size
of the projected image.
• The image offset is 134% +/-5%. This
means that if you have an image 60
inches (1.5 meters) tall from a table-mounted projector, the bottom of the
image will be 20.4 inches (51.8 cm) above the centerline of the lens.
60” image
(height)
bottom of image
20.4” above center
of lens
Projection angle
lens center
Table 1: IN3128HD (1080P) Screen size
Diagonal
Screen Size
(inches/m)
Size of the
Pr
ojected
Image Width
(inches/m)
Distance to screen
Minimum
distan
ce
(inches/m)
Maximum
distance
(inches/m)
40”/1.0m 35”/0.9m 48”/1.2m 72”/1.8m
60”/1.5m 52”/1.3m 72”/1.8m 108”/2.7m
80”/2.0m 70”/1.8m 96”/2.4m 144”/3.7m
100”/2.5m 87”/2.2m 120”/3.1m 180”/4.6m
150”/3.8m 131”/3.3m 180”/4.6m 270”/6.9m
174
227
71
Ceiling mount screws:
M4x8 (Max. L= 8mm)
Unit: mm
