Positioning your projector
17
Obtaining a preferred projected image size
The distance from the projector lens to the screen, the zoom setting (if available), 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 so that it
projects at a slightly downward angle.
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.
How to determine the position of the projector for
a given screen size
1.
Refer to the table and find the closest match to your screen size in the left columns
labelled
"Screen dimensions" on page 19
. Using this value, look across this row to the
right to find the corresponding average distance from screen value in the column
labelled
"avg" on page 19
. This is the projection distance.
2.
Decide the exact position of your projector according to the position of your screen
and the adjustable lens shift range.
How to determine the recommended screen size
for a given distance
This method can be used for situations where you have purchased this projector and
would like to know what screen size will fit in your room.
The maximum screen size is limited by the physical space available in your room.
1.
Measure the distance between the projector and where you want to position the
screen. This is the projection distance.
2.
Refer to the table and find the closest match to your measurement in the average
distance from screen column labelled
"avg" on page 19
. Check that your measured
distance is between the min and max distances listed on either side of the average
distance value.
3.
Using this value, look across that row to the left to find the corresponding screen
diagonal listed in that row. That is the projected image size of the projector at that
projection distance.
BenQ W1300.book Page 17 Thursday, August 29, 2013 2:07 PM
