Making Adjustments; Adjusting The Focal Balance; Correcting The Focus - Panasonic ET-ELW22C Operating Instructions Manual

Making Adjustments

Adjusting the Focal Balance

The focal balance between the center and periphery of the projected image changes
depending on the size of the projected image.
The lens is equipped with a focus balance adjustment function for the screen periphery.
■ Procedure for adjusting the focal balance
Periphery focus adjustment ring
Note
z The projected image sizes and scale shown on the periphery focus adjustment ring are an
approximate guide.

Correcting the Focus

When the projection lens is attached to the projector and images are being projected
onto the screen, the peripheral focus may be out of focus in some localized areas.
In such cases, use the supplied spacers to correct the focus of these areas, and perform
adjustments so that the entire image is even.
■ Relationship between lens orientation and screen focus
If the projection lens is tilted with respect to the plane of the screen, uneven focus will
result. For example, when the front side of the lens (screen side) is tilted downward as
shown in the figure below (direction of the dotted arrow), the upper part of the screen
will be tilted backward and the lower part of the screen will be tilted forward.
Screen surface versus focal point
6-ENGLISH
1) Focus the center of the screen by
operating the projector unit.
2) Turn the periphery focus ring by
hand as shown in the figure to
adjust the focus in the periphery
of the screen.
Projection lens
Image formation surface