Benq W5000 Manuale Utente

12 

Positioning your projector  

Eng
lish

Obtaining a preferred projected image size

The distance from the projector lens to the screen, the zoom setting, and the video format each factors in the 
projected image size.
The projector should always be placed horizontally level (like flat on a table), and positioned directly 
perpendicular (90° right-angle square) to the horizontal center of the screen. This prevents image distortion 
caused by angled projections (or projecting onto angled surfaces). If the projector is mounted on a ceiling, it 
must be mounted upside-down.
This projector is equipped with a movable lens. See 

"Shifting the projection lens vertically"

 below for details. You 

can see the diagrams on pages 

14

 and 

15

 for the vertical offset values in the dimension tables that are measured 

when the lens is shifted fully up or down.
If the projector is positioned further away from the screen, the projected image size increases, and the vertical 
offset also increases proportionately.
When determining the position of the screen and projector, you will need to account for both the projected 
image size and the vertical offset dimension, which are directly proportional to the projection distance.
BenQ has provided separate tables of dimensions for both 16:9 and 4:3 screen ratios to assist you in determining 
the ideal location for your projector. There are two dimensions to consider, the perpendicular horizontal distance 
from the center of the screen (projection distance), and the vertical offset height of the projector from the 
horizontal edge of the screen (offset).

Shifting the projection lens vertically

The vertical lens shift control provides flexibility for installing your projector. It allows the projector to be 
positioned slightly above or below the top level of the projected images.
The lens shift (offset) is expressed as a percentage of the projected image height. It is measured as an offset from 
the projected image's vertical center. The projector is equipped with + 120% and - 80% vertical lens shift. You 
can shift the projection lens upwards or downwards within the allowable range depending on your desired image 
position.
To adjust the vertical position of the projection lens:
1.

Press LENS or  /  (when the OSD menu is not activated) on the 
remote control, or LENS SHIFT  /

 on the projector to display the 

adjustment page. 
(Pressing ENTER in the Picture -- Advanced > Lens Shift menu 
performs the same function.)

2.

To raise the projected image, press   on the remote control or Lens 
Shift   on the projector.
To lower the projected image, press   on the remote control or Lens 
Shift   on the projector.

Center of the lens

Center of the lens

Projector position:

Floor front or floor rear

Projector position:

Ceiling front or ceiling rear

W20000-en.book  Page 12  Monday, October 22, 2007  3:35 PM