Throw Distance - Christie DLV1280 DX User Manual

Always consult this Appendix when planning a projector installation. See also 2.3, Projector Position and Mounting.
Calculating Throw Distance
Correct throw distance depends on the screen size and lens present—the larger the image
needed, the greater the distance you must allow between the lens and screen. Once you
know the screen size and lens type present, you can calculate the precise throw distance you
is sometimes the case for large venues or elevated installations, throw distance still
represents the smallest measurement between the screen and front feet center axes.
Pre-calculated throw distances for the standard lens and screen sizes appear on the
following page. Refer to this chart to quickly determine the proper throw distance
(±5%) for your installation and this lens. NOTE: Other compatible lenses are listed
on page 5-1, however their throw distance formulas are not included in this manual.
Lens Throw Ratio
1.2:1 (standard)
NOTE: Make sure to use HORIZONTAL screen size in this formula.

Throw Distance

Table E-1. Throw Distance Formula
Throw Distance Formula (in.) ±5%
1.24 x screen width (↔ in.) + 9.84
A p p e n d i x E
require by using the
appropriate formula as
found in this appendix.
Throw distance is the
distance between the
projector front feet and the
screen. This measurement
is not necessarily parallel to
the floor—i.e., the projector
and screen may be inclined.
NOTE: If your projector
is tilted up or down in
relation to the screen, as
Diagonal Screen Size ➹ (in.)
60-360"
DLV1280 DX User's Manual
E-1