Panasonic PT-D10000 Adjustment Manual page 5

When selecting a soft screen, caution is required with regard to image patching.
When a droop or wrinkle exists on the screen surface at the lapped part of two blended
images, double images are generated and the intended performance cannot be obtained.
* Points to keep in mind
When a soft screen is used for separating the projection room and auditorium, the
screen tends to sag when a door is opened or closed or when there is a change in
atmospheric pressure originating from air-conditioning equipment, thereby causing
double images at the lapped part of the edge-blended images.
Correct setting of air-conditioning (airflow direction, force, ventilation devices) and
suitable door design (door position, sliding door etc) are required.
Lens selection
In the majority of rear projection environments, the space is limited and use of a fixed
short-focus lens is unavoidable. However, because of wide incidence angle projected onto
the rear screen, there is a big difference in brightness when viewed from the side.
Therefore the short focus zoom lens (3-chip DLP type: ET-D75LE6, 1-chip DLP type:
ET-DLE100) are recommended.
Despite its short focus, LE6 enables zooming and lens shift in the up-down and left-right
directions along with a wide range of adjustment such as deviation correction of projector
installation position.
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