7. Lenses & lens holder
U
D
SIDE VIEW
P
F
TOP VIEW
P
F
L
R
+50%
-50%
-30%
+30%
U
D
L R
P
F
+50%
-50%
-30% +30%
Image 7-16
PDMD.
F Field of view.
How to shift the lens of the DPxK BLP series projector?
1. Use the up and down arrow keys on the local keypad to shift the lens vertically and use the left and right arrow keys on the
local keypad to shift the lens horizontally.
Image 7-17
How to zoom in or out?
1. Is the zoom lens equipped with a m otorized zoom?
If yes, use the “+” and “-” z oom keys on the local keypad to zoom in or out.
Image 7-18
If no, use the zoom barrel on the lens to zoom in or out.
How to focus?
1. Use the “+” and “ -” focus keys on the local ke ypad to focus the image on the screen.
Image 7-19
Take into account that the lens focus m
ay slightly drift while the lens is warming up from cold to operation
temperature. This is a typical phenom enon for projection lenses used with high b rightness projectors. The
operation temperature o f the lens is reached after ap pro ximately 30 minutes projection of average video.
7.6 Back Focal Length adjustment
When to adjust the Back Focal Length?
If a lens is used with a throw ratio suited for the a pplication, (lens selection depends on projection distance and screen size) typically
one would NEVER need to adjust the Back Focal Length of the projector.
A Back Focal L ength adjustment is only required in c ase the F ocus range of the installed lens does not capture the projection
screen either for FLAT and/or for SCOPE. In other words, when it is impossible to focus the image on the screen for FLAT and/or
70
R5906753 DPXK BLP SERIES 20/11/2017
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