Bedienungsanleitung BenQ W1080ST (Seite 14 von 61) (Englisch)

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Positioning your projector

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 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.

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 positions 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.

This projector is equipped with a movable lens. See "Shifting the projection lens vertically" on page 20 for

details. You can see the diagrams on pages 16 and 18 for the vertical offset values in the dimension tables

that are measured when the lens is shifted fully up or down.

Lens shift is only available on W1070.

How to determine the position of the projector for a given screen size

1. Determine the aspect ratio of your screen, 16:9 or 4:3?

2. Refer to the table and find the closest match to your screen size in the left columns labelled "Screen

dimensions". Using this value, look across this row to the right to find the corresponding average

distance from screen value in the column labelled "Average". This is the projection distance.

3. Decide the exact position of your projector according to the position of your screen and the

adjustable lens shift range.

W1070: If you are using a 120-inch, 4:3-aspect-ratio screen, please refer to "The screen aspect ratio is 4:3

and the projected picture is 16:9". The average projection distance is 3494 mm.

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. Determine the aspect ratio of your screen, 16:9 or 4:3?

2. Measure the distance between the projector and where you want to position the screen. This is the

projection distance.

3. Refer to the table and find the closest match to your measurement in the average distance from

screen column labelled "Average". Check that your measured distance is between the min. and max.

distances listed on either side of the average distance value.

4. 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.

W1070: If you have a 16:9-aspect-ratio screen and your measured projection distance was 4500 mm,

please refer to "The screen aspect ratio is 16:9 and the projected picture is 16:9". The closest match in

the "Average" column is 4543 cm. Looking across this row shows that a 170-inch screen is required.

Checking the min. and max. projection distance values in the columns of "Projection distance <D> [mm]"

on page 16 indicates that the 4500 mm measured projection distance will also fit the 150 and 190-inch

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