10-ENGLISH
Projection relationships (continued)
Perform the lens position shift within the adjustment range.
Perform lens shift adjustment within the ranges shown in the following illustrations.
The focus may change when the lens position is shifted out of the adjustment range.
This is because the movement of the lens is restricted to protect the optical parts.
The following illustrations depict lens shift ranges for floor installations of the projector.
PT-MZ880 / PT-MZ780 / PT-MZ680
0.5V
0.24H
0.24H
0.5V
Standard projection
position
Projected image height V
Projected image width H
Optical axis center
Note
z
The home position of the projector a point of origin position for the lens shift (i.e., vertical
and horizontal positions of the lens) based on the results of lens calibration. It is not the
optical center position of the screen.
Lens shift ranges
Projector
model
Only [KEYSTONE]
used
[KEYSTONE] and [CURVED CORRECTION]
used together
Only [CURVED
CORRECTION] used
Vertical
keystone
correction
angle α (°)
Horizontal
keystone
correction
angle β (°)
Vertical
keystone
correction
angle α (°)
Horizontal
keystone
correction
angle β (°)
Min. value
of R2/L2
Min. value
of R3/L3
Min. value
of R2/L2
Min. value
of R3/L3
PT-MZ880 /
PT-MZ780 /
PT-MZ680
±5
0
-
-
-
-
-
-
Note
z
When [GEOMETRY] is used, the focus of the entire screen may be lost as correction
increases.
