InFocus IN3916, IN3900 manual Positioning the projector, Diagonal Screen, Size, Width, Feet, Inches

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 between 30 inches (.75m) and 65 inches (1.65m) from the screen. To ensure adequate cable access, do not place the projector within 24 inches (.61m) of a wall or other object.

•If you are installing the projector on the ceiling, we strongly recommend 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 SP-CEIL-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 34. 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 and the video format determine the size of the projected image. (The throw ratio of the IN3916 is 0.49:1.)

•IN3916 image offset is 105% +/-2%. This means that if you have an image 40 inches (1 meter) tall from a table-mounted projector, the bottom of the image will be 2.8 inches (.07 meter) above the centerline of the lens.

		Table 1: Screen Size
Diagonal Screen		Size of the Projected Image			Projection
					Distance (L)
Size			Width
					Minimum
Feet	Inches	Meters	Inches	Milimet	Meters	Inches
				ers
5.9	71	1.8	60	153	0.75	30
6.7	80	2.0	68	172	0.84	33
7.5	90	2.3	76	194	0.95	37
7.8	94	2.4	80	202	0.99	39
8.3	100	2.5	85	215	1.05	41
8.7	104	2.6	88	224	1.10	43
10.0	120	3.0	102	258	1.26	50
13.0	156	4.0	133	337	1.65	65

40inches high image

bottom of image 2.8 inches above center of lens

Projection angle

lens center

6