Christie CP2000-X Setup Guide download pdf (Page 18)

Section 2: Installation & Setup

2-10 CP2000-X SETUP GUIDE

020-100059-01 Rev 1. (03/08)

distances are calculated from the screen to the front bezel of the projector rather

than its foot centers. To figure throw distance from foot centers, add 22.2 cm

(8.74”).

Figure 2.11 Estimating Throw Distance: Example

As shown in Figure 2.11, throw distance is approximately equal to the full

horizontal width of the screen multiplied by the type of lens you are using. For

example, if you are using a 1.25:1 lens, the proper throw distance value will be

approximately 25% more than that of the full screen width. Once you know your

screen width and lens, you can estimate throw distance needed. Or, if you know

the available throw distance beforehand, you can determine what images sizes

are possible with a given zoom lens. IMPORTANT: For proper placement in any

installation, use the throw distance formula provided for your lens. In addition,

please keep in mind that due to lens manufacturing tolerances for lens focal

length, actual throw distance can vary ±5% or more between lenses described as

having the same throw ratio.

Refer to the offsets shown here for help in determining how high or low to install

the projector in relation to the center of the screen, and/or how far off to one side.

VERTICAL POSITION describes the elevation of the projector in relation to the

screen. For many typical large venue rental/staging installations and theatres, the

projector will be above screen center. An ideal vertical position helps ensure that

1) images will be accurately rectangular in shape rather than distorted into a

keystoned shape with non-parallel sides, and 2) focus and brightness will remain

optimized.

Vertical position of the image can be manually offset—that is, placed higher or

lower in relation to lens center—using the vertical offset knob on the lens mount.

Starting with no offset, the 2048 x 1080 image from this projector can be moved

by a maximum distance of 540 pixels, resulting in all of the image displayed

above or below lens center (Figure 2.12).

Vertical & Horizontal

Position

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Christie CP2000-X Setup Guide Page 18