Working With The Lens; Zoom; Offsets - Christie CP2000 User Manual

BASIC OPERATION
3.8 Working with
the Lenses
Zoom 
Offsets 
3-48
NOTE: See Section 2,
Installation and Setup for
all lens installation and
boresight instructions.
The CP2000 lens mount
secures the primary zoom
lens to the projection
head. It provides 1) setup
adjustments for correct
boresight, and 2)
manually controlled
focus, zoom and offsets
for general use.
An anamorphic lens
(1.25x) can be installed
into an optional
anamorphic lens mount,
then swung into place in
front of the primary lens to widen a "squeezed" image into a properly proportioned
"scope" anamorphic cinema display. It is typically used in theatres having side masks
that are retracted for "scope" images, or in theatres having fixed side masking but a
very short throw ratio (throw ratio= throw distance/screen width). To move the
anamorphic lens, select the anamorphic button on the Main
menu of the TPC.
With the projector in its permanent location, turn the lens zoom
ring on the CP2000 primary lens to enlarge or shrink the image
in each direction as necessary.
With the projector in its permanent
location, turn the horizontal and/or
vertical offset knobs as necessary so
that the image is square on the
screen—particularly at the top— with
no keystoning. For best results, avoid
extreme offsets. Corner vignettes on a
white test pattern indicates extreme
offsets that should be avoided.
If you need more vertical offset range,
it is possible that CP2000
mechanical TILT should be changed
to help compensate for significant
differences in screen and lens height.
Refer back to Section 2.
NOTE: Vertical offset ranges are shown in Figure 2.37.
Figure 3.18. Anatomy of the Lens Mount
's
LIT MAN USR CP2000
020-100032-04 Rev. 1 (03/14)