Sharp PG-D120U Operation Manual page 10

Projector Distance and Picture Size Relationship
The zoom lens allows adjustment of the image size within the projector's range.
For optimum picture adjustment, the projector should be placed and adjusted at a distance between 5.1 ft to 56.3
ft from the screen.
Distance from screen
Picture size: 100 inches (254 cm)
Zoom adjustment range: 18.4 ft to 13.1 ft
90
Distance between lens and screen: Projection distance (L)
Above is an illustration of maximum and minimum projection distances for the PG-D100U with a picture size of
100 inches. Move the projector forward or back if the edges of the image are distorted.
Height of projector
Adjust to match the setup configuration.
Screen
H
Lower edge of screen (white portion)
Ceiling Mount
When the projector is in the inverted
position, use the upper edge of the screen
as the base line.
Note:
Optimal image quality can be achieved with
the projector positioned perpendicular to the
screen.
E-10
Picture size
(diag.)
300 inches
150 inches
100 inches
80 inches
60 Inches
40 inches
90
Minimum L: 13.1 ft (4.0 m)
Maximum L: 18.5 ft (5.7 m)
Lens center
Rack/
stand
High edge of screen
Projection distance (L)
Maximum projection distance
56.3 ft (17.2 m)
28.0 ft (8.5 m)
18.5 ft (5.7 m)
14.8 ft (4.5 m)
11.0 ft (3.4 m)
7.2 ft (2.2 m)
The formula for picture size and projection distance
y = 0.0575 x – 0.097
1
y = 0.041 x – 0.0943
2
x : Picture size (diag.) (inches)
y : Maximum projection distance (m)
1
y : Minimum projection distance (m)
2
Note:
There is an error of
Diagram shows the lens shift position set at the
Lens
factory.
center
Picture size
(diag.)
300 inches
150 inches
100 inches
80 inches
60 Inches
40 inches
H
Minimum projection distance
40.0 ft (12.2 m)
19.9 ft (6.1 m)
13.1 ft (4.0 m)
10.4 ft (3.2 m)
7.8 ft (2.4 m)
5.1 ft (1.5 m)
4 inches ( 10 cm) in the formula above.
Distance from lens center to
lower edge of screen (H)
63
25 / inches (66 cm)
64
12 63 / inches (33 cm)
64
8 21 / inches (22 cm)
32
7 3 / inches (18 cm)
32
5 1 / inches (13 cm)
8
35
3 / inches (9 cm)
64
Lens center