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2. Installation
BenQ PE8700 User’s Manual
10
Ceiling Installation
Distance: Projection distance (the distance between the projection lens and the screen).
Height 1: The vertical height of the screen uppper edge
Roof: The height of the roof.
Height 2: The height from the base plate to the center of lens (2.78 inch or 70.64 mm).
Offset: The difference in height between the center of the projection lens and the upper edge of the projection
image at zoom wide. (The projector should be installed horizontally. )
1. Choose the screen width you desired from the chart below, installing the projector at a distance from the screen
between the corresponding Minimum and Maximum Distance. (Minimum Distance = 1.36 x Screen Width,
Maximum Distance = 1.66 x Screen Width)
2. Fine tune the projected image size using the zoom and focus rings on the projection lens.
3. Decide on the exact height you desire for the center of the screen's Height.
4. Mount this unit using ceiling mounting rack with a suitable length (Roof - Height 1 - Offset - Height 2) to meet your
requirements, and avoid any keystone distortion.
5. Alternatively, use the adjusters to fine tune the projection angle to meet your requirements, and then use the
keystone correction function to correct any distortion.
16 : 9 (720P mode) (inch)
Distance
Roof - Height 1 - Offst -Height 2
Center of the lens
Ceiling
Upper edge of the screen
Height 1
Height 2
Screen Width (W)
40.0 60.0 80.0 90.0 100.0 110.0 120.0 130.0 140.0 160.0 180.0 200.0
Screen Height (H)
22.5 33.8 45.0 50.6 56.3 61.9 67.5 73.1 78.8 90.0 101.3 112.5
Screen Diagonal (D)
45.9 68.9 91.8 103.3 114.8 126.2 137.7 149.2 160.7 183.6 206.6 229.5
Distance Minimum (W *1.36)
54.4 81.6 108.8 122.4 136.0 149.6 163.2 176.8 190.4 217.6 244.8 272.0
Maximum (W *1.66)
66.4 99.6 132.8 149.4 166.0 182.6 199.2 215.8 232.4 265.6 298.8 332.0
Offset (H *1.44) (mm)
32.4 48.6 64.8 72.9 81.0 89.1 97.2 105.3 113.4 129.6 145.8 162.0
Roof
Offet