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Projection Distance
The following describes the projection distance and height from lens center to bottom of screen
by each projected screen size.
The projection distance is the distance between the center of the lens and the surface of the
projected image.
Height H is the height from the bottom of the projected image (top for ceiling mount) to A
(determined by drawing a perpendicular line from lens center to projected image surface).
Floor Installation (Rear foot (adjustable) fully extended)
Height H from lens
center to bottom
of screen
Projection distance
Projected image size
Diagonal D
50 inch (1.27 m)
60 inch (1.52 m)
70 inch (1.78 m)
80 inch (2.03 m)
100 inch (2.54 m)
Projection distance formula
D: Projected image size (Diagonal)
H: Distance between the bottom edge of the image and the center of the lens
Expression#1
42
Projection Distance
Projection distance L
Projected
image
A
Width × Height
1.08 × 0.67 (42 × 26)
1.29 × 0.81 (51 × 32)
1.51 × 0.94 (59 × 37)
1.72 × 1.08 (68 × 42)
2.15 × 1.35 (85 × 53)
Projection Distance L
L=0.013794 × D – 0.0394 (L=0.543087 × D – 1.5503)
Center of the lens
Height H from lens
Projection
center to bottom of
Distance L
0.65 (26)
0.79 (31)
0.93 (36)
1.06 (42)
1.34 (53)
Unit: m (inches)
screen
0.15 (5.83)
0.18 (7.00)
0.21 (8.16)
0.24 (9.33)
0.30 (11.66)
Unit: m (inches)
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