ENGLISH-5
Preparation (continued)
Peripheral focus adjustment function
When you change the size of the projected image, the focal balance between the center
and peripheral areas of the screen may shift. This shift in balance tends to increase
proportionally with smaller throw ratios.
The ET-D3QW300 / ET-D3QS400 / ET-D3QT500 is equipped with a peripheral focus
adjustment function to correct the shift in focal balance between the center and
peripheral areas of the screen.
1) Loosen the lock screw by
turning it counterclockwise.
2) Turn the lens barrel tip or
peripheral focus adjustment
ring in the direction of the
arrow to match the projection
distance displayed on the lens
to the actual distance from the
lens to the screen.
3) Tighten the lock screw by
turning it clockwise.
4) Operate the projector to align
the focus of the center of the
projected image.
Note
z
The projection distances displayed on the lens are approximate guides.
The illustrations in this procedure depict
attachment of the ET-D3QW300 onto the
PT-RQ50K.
z
The structure of the peripheral focus
adjustment part differs depending on the
projection lens type.
Peripheral focus adjustment ring
Lock screw
■
Adjusting the focus
