Epson Powerlite 8000i Multimedia Projector Users Guide

61
2Using the Projector
T
his chapter provides the following information about using your
projector:
p
Positioning the projector relative to the screen
p
Focusing and positioning the screen image
p
Resizing the projected image
p
Sleep mode
p
Controlling the projector with the remote control and the control 
panel
p
Monitoring the projector’s operating status
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2  •  Using the Projector
            62
The illustration below identifies the parts of your projector.
Positioning the Projector
Your projector supports front, rear, and ceiling projection, allowing 
you to choose the best method for displaying your images. If you use 
rear or ceiling projection, you need to select this in the projector’s 
Advanced menu. See page 97 for more information. 
adjustable feet
foot adjust levercontrol panel
status lightsinfrared receiver infrared receiver
foot adjust 
lever...

Positioning the Projector
63
To get the best results when projecting your images, it’s important to 
position the projector at the proper height and distance relative to the 
screen.
When projecting from a table or desk, place the projector so the lens is 
aligned as closely as possible with the bottom of your screen:
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2  •  Using the Projector
            64
When projecting from the ceiling, align the lens as closely as possible 
with the top of your screen:
Using the Keystone Feature
In circumstances where the lens cannot be properly aligned, use the 
projector’s Keystone function to help maintain optimum screen 
geometry. p
Press the Optical Keystone Adjustment knob on the side of the 
projector (next to the handle). When the knob pops out, turn it  
clo ckw ise  o r co unt er clock wis e t o  mo ve  the  le n s up...

Positioning the Projector
65
Calculating Image Size and Projection Distance
The distance between the projector and the screen determines the 
actual image size. To determine the exact distance required for a 
particular image size (or to determine the size of an image at a 
particular distance), use the formulas given below. (Remember that 
the size of the image can be changed by rotating the zoom ring; see 
page 69 for more information.)
Standard Lens Calculations
To determine the maximum and minimum...

2  •  Using the Projector
            66
For example, here are the measurements for three installations:* For an image size of 300 inches, the projector may be up to 52.1 feet away from 
the screen, depending on the setting of the zoom ring.
Long Throw Zoom Lens Calculations (ELPLL02)
To determine the maximum and minimum diagonal size of an image 
when you know the projection distance:p
Inches:
Maximum diagonal size = (0.487 ´ projection distance) + 2.336
Minimum diagonal size = (0.286 ´ projection...

Positioning the Projector
67
To determine the projection distance when you know the diagonal size 
of the screen image:p
Inches:
Maximum projection distance = (3.492 ´ diagonal size) - 5.091
Minimum projection distance = (2.053 ´ diagonal size) - 4.795
p
Centimeters:
M
aximum projection distance = (8.8696 
´ diagonal size) - 12.9311
M
inimum projection distance = (5.214 
´ diagonal size) - 12.1793
Short Throw Zoom Lens Calculations (ELPLW01)
To determine the maximum and minimum diagonal size of an image...

2  •  Using the Projector
            68
Fixed Short Throw Lens Calculations (ELPLR01)
To determine the diagonal size of an image when you know the 
projection distance:p
Inches:
Diagonal size = (1.239 ´ projection distance) + 3.415
p
Centimeters:
Diagonal size = (3.1470 ´ projection distance) + 8.6741
To determine the projection distance when you know the diagonal size 
of the screen image:
p
Inches:
Projection distance = (0.807 ´ diagonal size) - 2.756
p
Centimeters:Projection distance = (2.0497 
´...

Focusing and Positioning the Screen Image
69
Focusing and Positioning the Screen Image
When an image appears on screen, check that it is in focus and 
correctly positioned on the screen. 
  
p
To focus the image, rotate the focus ring (the inside ring on the 
lens). 
p
To adjust the size of the image, rotate the zoom ring (the outside 
ring). Rotate the zoom ring clockwise to make the screen image 
larger or counterclockwise to make it smaller. 
Note: You can’t adjust the screen image size with the fixed...

2  •  Using the Projector
            70
If you need to raise or lower the image on the screen, extend or retract 
the two feet at the bottom of the projector as follows:
1. Stand behind the projector and support the front of it while you 
lift up on the foot adjust levers, located above the feet. This 
unlocks the adjustable feet so they can move up and down. Don’t 
let the projector drop.
Caution: Don’t hold or lift the projector by its lens. This can damage 
the lens.
2. While lifting the levers,...