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112 Appendix A: Projector Installation
Lens Shift is better than angling the projector up or down to position
the image, since it won’t produce keystone distortion, which must be
eliminated electronically.
If you mount the projector on the ceiling above screen level, you’ll
have to tilt it down to center the image on the screen. This causes the
image to lose its square shape, but you can correct the distortion by
using the
Keystone function in the projector’s menu system (see
page 67) or by pressing the
Keystone button on the projector’s
control panel.
Image Size and Projection Distance
For standard lens usage, refer to the table below to help you determine
projector placement if you know the size of image you want to display.
(For information about using other lenses, see page 113.)
* The projector’s native aspect ratio is 4:3. When you display a 16:9-sized image, the image height is
reduced. See page 115.
** Projection distance refers to the horizontal distance from the lens to the screen. The image size will
differ if you tilt the projector up or down at the screen or use the projector’s Keystone function.
note
If you’ve installed the
wide-angle rear projection
lens, you won’t be able to use
the projector’s Focus, Zoom,
or Lens Shift functions. You
must position the projector
itself to obtain the desired
image height, size, and focus
(but Keystone correction can
still be used).
Image size (4:3 aspect ratio)*
Projection distance**Diagonal Width × height
30 inches 24 × 18.1 inches (61 × 46 cm) 3.4 to 4.8 feet (104 to 146 cm)
40 inches 31.9 × 24 inches (81 × 61 cm) 4.7 to 6.5 feet (142 to 197 cm)
50 inches 39.4 × 30 inches (100 × 76 cm) 5.9 to 8.2 feet (180 to 249 cm)
60 inches 47.2 × 35.4 inches (120 × 90 cm) 7.1 to 9.9 feet (217 to 301 cm)
80 inches 63 × 47.2 inches (160 × 120 cm) 9.6 to 13.3 feet (293 to 404 cm)
100 inches 78.7 × 59.1 inches (200 × 150 cm) 12.1 to 16.7 feet (369 to 508 cm)
200 inches 161.4 × 118.1 inches (410 × 300 cm) 24.5 to 33.6 feet (747 to 1025 cm)
300 inches 240.2 × 181.1 inches (610 × 460 cm) 36.9 to 50.6 feet (1126 to 1543 cm)
400 inches 318.9 × 240.2 inches (810 × 610 cm) 49.4 to 67.6 feet (1505 to 2060 cm)
500 inches 393.7 × 299.2 inches (1000 × 760 cm) 61.8 to 84.6 feet (1883 to 2578 cm)
600 inches 474.4 × 358.3 inches (1200 × 910 cm) 74.2 to 101.5 feet (2262 to 3095 cm)
112


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