Sim2 Crystal - Manual (Page 13)

13 Positioning your projector
For example, if you have a 16:9-aspect-ratio screen and your measured projection
distance was 4.5 m (450 cm), 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 455 cm. Looking
across this row shows that a 100-inch screen is required.
Checking the min and max projection distance values in the columns of "Projection
distance <D> [cm]" on page 14 indicates that the 4.5 m measured projection distance
will also fit the 90 and 110-inch size screens. The projector can be adjusted (using the
zoom control) to display on these different screen sizes at the projection distance. Be
aware that these different screens have different vertical offset values.
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
picture distortion" on page 22 for details.