Download Epson EB-Z10000U User`s guide

Installing the Projector
When using a short throw zoom lens ELPLU02
Follow the steps below to adjust the focus when the lens is shifted up,
down, left, or right using the lens shift function.
a
b
38
c
Correct screen distortion using the distortion ring.
d
Focus the entire screen.
When correcting distortion, the area around the edges of the image
is also focused.
Turn the distortion ring counterclockwise until it cannot go any
further.
Focus the image around the center of the lens.
s "Adjusting the Focus" p.37
Example: When the lens shift is turned all the way down.
If the area around the lens axis is out of focus, fine-tune by turning
the distortion ring.