Barco SP2K-S

R5913197 /02 SP2K-S58
5.4 Lens shift, zoom & focus
Motorized lens adjustment
The SP2K-S projector is equipped with a motorized lens shift functionality and a motorized zoom & focus
functionality.
About the shift range
The lens can be shifted with respect to the internal optics of the projector (DMD) which results in a shifted
image on the screen (Off-Axis). A 100% shift means that the center point of the projected image is shifted by
half the screen size. In other words, the center point of the projected image falls together with the outline of the
image in an On-Axis projection. Due to mechanical and optical limitations the shift range is limited as well.
All lenses have a shift range of 40% up, 70% down, 15% left, and 15% right. This range is valid for all throw
ratios. Within these shift ranges the projector and lens perform excellently (color/brightness uniformity is ok).
Configuring the projector outside these shift ranges will result in a slight decline of image quality.
It’s mechanical possible to shift outside the recommended field of view, but this will result in a
decline of image quality depending on the used lens and the zoom position of the used lens.
Furthermore, shifting too much in both directions will result in a blurred image corner (and color/
brightness uniformity is out of spec).
U
D
SIDE VIEW
P
F
TOP VIEW
P
F
L
R
+40%
-70%
-15%
+15%
U
D
L R
P
F
+40%
-70%
-15% +15%
Image 5–6
P DMD
F Field of view
Take into account that when using Scheimpflug to adjust the lens holder, the shift range will become
asymmetrical as a direct consequence. An up/down shift range of 30%/70% could (for example)
become 25%/75% instead after Scheimpflug adjustment.
For this reason it is advised to perform Scheimpflug adjustment after you have reached the
sharpest possible image using lens shift, zoom and focus.
How to shift the lens of the SP2K-S projector?
1. In the Configuration – Lens Selection menu, Select the correct lens file and the calibrate the selected lens
with a Calibrate & return to mid position action.
2. Use the up and down arrow keys in the Light, dowser, lens menu to shift the lens vertically and use the
left and right arrow keys to shift the lens horizontally.
Lenses & Lens holder