16-ENGLISH
Preparation (continued)
Focus Adjustment
The focus balance of the center of the projected image and that of the peripheral areas
differs depending on the size of the image.
This lens is equipped with a function for adjusting the peripheral focus balance.
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Adjusting the focus
The illustrations in this procedure depict
use of the PT-RZ970 series as an
example.
1) Operate the projector to align
the focus of the center of the
image.
2) Manually turn the peripheral
focus adjustment ring as
shown on the left, and align the
focus of the peripheral areas of
the image.
Attention
z
The projected images sizes indicated on the peripheral focus adjustment ring are
approximate guides.
Peripheral focus adjustment ring
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When out of focus
The peripheral areas or center of the projected image may be out of focus depending on
the combination of this lens and the projector. In that case, adjust the flange back and
align the focus as described in the following procedure. The flange back is the distance
from the lens mount reference surface (flange) to the mirror surface of the DLP chip.
Tool to use: Hexagonal wrench (diagonal 1.5 mm)
Attention
z
When adjusting the flange back, take care that the projected light does not
shine into your
eyes.
