InFocus IN74, IN76, IN78, IN72 manual Positioning the projector, 60/1.5, 2.4 80/2, 10.4/3.2 92/2.3

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/ IN76/IN78, the image offset is 115%.

Table 1:

Range of distance to the screen for a given screen size

for the IN72

		Distance to screen
	Diagonal	Maximum	Minimum
	Screen Size	distance	Distance
	(inches/m)	(feet/m)	(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/IN78

	Distance to screen
Diagonal	Maximum	Minimum
Screen Size	distance	Distance

10 ft high image

bottom of image

2.8ft above center of lens

Projection angle in 16:9 mode

lens center

	(inches/m)		(feet/m)	(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

NOTE: Visit the Service section of our website at www.infocus.com/calcu- lator for an interactive image size calculator.

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