Barco F50 User Manual

5. Installation
5.8 Lens shift and offset matrix
Adjusting the horizontal and vertical position of the image
Ideally in any ins tallation the p rojector is positioned totally perpendicular to the screen to ensure a wholly rectangular im age. How-
ever, physical limitations mean that this is not always possible to do and the result is a trapezoidal effect upon the displayed image.
One w ay to correct this is by adjusting, or shifting, the vertical or horizontal position of the image.
The amoun t of available vertical or horizontal offset is dependent on wh at type o f lens is installed in the projector and the projector
resolution, see im age 5-9 which illustrates the vertical offset values of an image. The same theory applies to horizontal shift. The
middle of the imag e is th e optical axis (0%), i.e. no shift. 100% shift equals half of the image height.
W
-100%
+100%
0%
H
Front elevation Side elevation
On axis (0% shift)
On axis (0% shift)
Image 5-9
Vertical Lens Shift Formula
Vertical shift = S creen Height x (Max. Lens S hift Vertical (%) ÷ 2) ÷ 100
If the screen is 1.2 m eters high and the v ertical lens offset value is +120% to +150% (min/max), then the vertical lens s hift will be
0.9 meters. This means that the (centre of the) image can be shifted up or down a max imum of 90 centimeters.
Calculation: 1.2 * (150÷2=75)75÷100=0.9
Horizontal Lens Shift Formula
Horizontal shift = Screen W idth x ( Max Lens Offset Horizontal (%) ÷ 2) ÷ 100
If the screen is 4.2 meters w ide and the horizontal lens offset value is +42%, then the horizontal lens sh ift will be 0.89 meters. This
means that the (centre of the) image can be shifted left or right by 89 centimeters.
Calculation: 4.2 * (42÷2=21)21÷100=.89
0% Lens Shi ft equ a ls on axi s (i.e. no shift). 1 0 0% Lens Sh ift equa ls half of ima ge height / width.
F50–series offset matrix
The following table shows the available offset for each lens by projector resolution.
EN57 EN53 EN55 EN52 EN56 EN 51 EN54
1080
Vertical +120% to
+140%
0 to +18% 0 to +108% 0 to +84% 0 to +108% 0 to +132% 0 to + 130 %
Horizontal +/- 4% +/- 6% +/- 42% +/- 32% +/- 42% +/- 54% +/- 54%
WUXGA
Vertical +116% to
+130%
0 to +6% 0 to +86% 0 to +66% 0 to +86% 0 to +110% 0 to +106%
Horizontal +/- 4% +/- 2% +/- 40% +/- 30% +/- 40% +/- 52% +/- 50%
Panorama
Vertical +120% to
+200%
0 to +92% 0 to +210% 0 to +180% 0 t o + 210% 0 to +212% 0 to +212 %
Horizontal +/- 4% +/- 22% +/- 58% +/- 48% +/- 88% +/- 72% +/- 70%
WQXGA
Vertical +116% to
+132%
0 to +30% 0 to + 110% 0 to + 88% 0 to + 110% 0 to + 142% 0 to + 142%
Horizontal +/- 4% +/- 12% +/- 52% +/- 40% +/- 52% +/- 64% +/- 64%
40 601–0307–00 F50 25/02/2016

Barco F50 Specifications

General

Brand	Barco
Model	F50
Category	Projector
Language	English