BenQ MP780 ST+, MW860USTi How to determine the recommended screen size for a given distance

Models: MW860USTi MP780 ST+

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

1.Select your screen size.

2.Refer to the table on page 19 and find the closest match to your screen size in the left columns labelled "Screen size". Using this value, look across this row to the right to find the corresponding distance from screen value in the column labelled "Distance from screen (mm)". This is the projection distance.

3.On that same row, look across to the right column and make note of the "Vertical offset (mm)" value. This will determine the final vertical offset placement of the projector in relation to the edge of the screen.

4.The recommended position for the projector is aligned perpendicular to the horizontal center of the screen, at the distance from the screen determined in step 2

above, and offset by the value determined in step 3 above.

For example, If you are using the MP780 ST+ and a 120-inch screen, the projection distance is 1293 mm and with a vertical offset of 264 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.Measure the distance between the projector and where you want to position the screen. This is the projection distance.

2.Refer to the table on page 19 and find the closest match to your measurement in the column labelled "Distance from screen (mm)".

3.Using this value, look across that row to the left to find the corresponding "Screen size" listed in that row. That is the projected image size of the projector at that projection distance.

4.On that same row, look across to the right column and make note of the "Vertical offset (mm)" value. This will determine the final placement of the screen in relation to the horizontal plane of the projector.

For example, if you are using the MP780 ST+ and your measured projection distance is 2.0 m (2000 mm), the closest match in the column is 1616 mm. Looking across this row shows that a 150-inch screen is required.

If you place the projector in a different position (to that recommended), you will have to tilt it down or up to center the image on the screen. In these situations, some image distortion will occur. Use the Keystone function to correct the distortion. See "Correcting keystone" on page 33 on page for details.

18 Positioning your projector

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BenQ MP780 ST+, MW860USTi user manual How to determine the recommended screen size for a given distance