Epson PowerLite 8150i Administrator's Manual page 18

When projecting from a table, the ideal arrangement is to set the
projector flat on its surface. This way, you can use the lens shift knob
(instead of raising the projector's feet) to position the image on-screen.
This delivers the best-looking picture. (See chapter 2 for details.)
You won't need to tilt the projector upward as long as you position it
so that its lens is at least as high as the bottom of the screen, but no
higher than the middle of the screen, as shown:
If you have to raise the front of the projector, you can use the
projector's keystone correction to eliminate distortion caused by
tilting the projector upward. But you'll get a better picture if you can
leave the projector flat on the table and use the lens shift knob to
adjust the height of the image.
If you're projecting from overhead, you can get the best-looking
picture by mounting the projector parallel to the ceiling, with its lens
at least as high as the middle of the screen, but no higher than the top
of the screen. Then use the lens shift knob to position the image
on-screen.
no higher than
middle of screen
no lower than
bottom of screen
ideal
range
note
After positioning the
projector, you may want to
connect a Kensington
®
MicroSaver anti-theft
device to the lock port on the
projector's left side. You can
purchase this from EPSON;
.
see page 13
Setting Up the Projector
17