Optoma EH501 User Manual page 28

Adjusting the position using the vertical lens shift
function
If the projector is not positioned right in front of the center of the screen, you
can adjust the vertical position of projected image by moving the vertical lens
ring within the shift range of the lens.
1. Lens shift adjustment for XGA
The display position can be shifted upward up to 6.5% elevation of the
display. (When turn the vertical lens shift ring to the right (left), the
display moves up (down)).
2. Lens shift adjustment for WXGA
The display position can be shifted upward up to 14.5% elevation of the
display. (When turn the vertical lens shift ring to the right (left), the
display moves up (down)).
EN-28
Shift to top
0.065V
1V
0.15V
Shift to top
0.145V
1V
0.12V
Lens shift adjustable range
6.5%
Lens shift center position
Lens shift adjustable range
14.5%
Lens shift center position
Shift range
Shift range