Barco Prometheus I, Руководство по безопасности и инструкция

Страница: 81 / 197

5. Lenses & lens holder
5.5 Lens shift, zoom & focus
Motorized lens adjustment
The Prometheus is equipped with a motorized lens shift functionality and a motorized zoom & focus functionality.
Maximum shift range
The lens can be shifted with respect to the DMD which result in a shifted image on the screen (Off-Axis). A 100% shift means that
the centre point of the projected image is shifted by half the screen size. In other words, the centre point of the projected image falls
together with the outline of the image in an On-Axis projection. Due to mechanical an optical limitations the shift range is limited as
well.
All DP2K lenses have a shift range of 50% up/down and 30% left/right. This range is valid for all throw ratios.
How to shift the lens of the Prometheus?
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 5-23
How to zoom in or out?
1. Is the zoom lens equipped with a motorized zoom?
If yes, use the “+” and “-” zoom keys on the local keypad to zoom in or out.
Image 5-24
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 keypad to focus the image on the screen.
Image 5-25
Take into account that the lens focus may slightly drift while the lens is warming up from cold to operation
temperature. This is a typical phenomenon for projection lenses used with high brightness projectors. The
operation temperature of the lens is reached after approximately 30 minutes projection of average video.
R5905963 PROMETHEUS SERIES 09/03/2015 77