21
Preparations
a (min length) =
Projection size (inches) - 0.795
32.885
a (max length) =
Projection size (inches) - 0.673
27.397
Projection
size
Projection distance a
Height (H)
min length
(zooming max)
max length
(zooming min)
30 inches
0.89 m (2.92 ft.)
1.07 m (3.51 ft.) 6.50 cm (0.21 ft.)
40 inches
1.19 m (3.90 ft.)
1.44 m (4.72 ft.) 8.70 cm (0.29 ft.)
50 inches
1.50 m (4.92 ft.)
1.80 m (5.91 ft.) 10.90 cm (0.36 ft.)
60 inches
1.80 m (5.91 ft.)
2.17 m (7.12 ft.) 13.10 cm (0.43 ft.)
70 inches
2.10 m (6.89 ft.)
2.53 m (8.30 ft.) 15.20 cm (0.50 ft.)
80 inches
2.41 m (7.91 ft.)
2.90 m (9.51 ft.) 17.40 cm (0.57 ft.)
90 inches
2.71 m (8.89 ft.)
3.26 m (10.70 ft.) 19.60 cm (0.64 ft.)
100 inches
3.02 m (9.91 ft.)
3.63 m (11.91 ft.) 21.80 cm (0.72 ft.)
120 inches
3.63 m (11.91 ft.)
4.36 m (14.30 ft.) 26.10 cm (0.86 ft.)
150 inches
4.54 m (14.90 ft.)
5.45 m (17.88 ft.) 32.70 cm (1.07 ft.)
200 inches
6.06 m (19.88 ft.)
7.28 m (23.88 ft.) 43.50 cm (1.43 ft.)
250 inches
7.58 m (24.87 ft.)
9.10 m (29.86 ft.) 54.40 cm (1.78 ft.)
300 inches
9.10 m (29.86 ft.)
10.93 m (35.86 ft.) 65.30 cm (2.14 ft.)
As seen from above
As seen from the side
Screen
Lens center
Projection Distance and Size
Use the figures, tables, and formulas below to determine the projection size and projection distance.
(Projection sizes are approximate values for full-size picture with no keystone adjustment.)
a is the distance (m, feet) between the
lens and the screen, and corresponds
to a range of 0.89 m (2.92 ft.) to 10.93
m (35.86 ft.). H is the height from the
image bottom to the center of the lens.
PJ X3131
a (min length) =
Projection size (inches) - 0.758
31.022
a (max length) =
Projection size (inches) - 0.643
25.845
Projection
size
Projection distance a
min length
(zooming max)
max length
(zooming min)
30 inches
0.94 m (3.08 ft.)
1.14 m (3.74 ft.)
40 inches
1.27 m (4.17 ft.)
1.52 m (4.99 ft.)
50 inches
1.59 m (5.22 ft.)
1.91 m (6.27 ft.)
60 inches
1.91 m (6.27 ft.)
2.30 m (7.55 ft.)
70 inches
2.23 m (7.32 ft.)
2.68 m (8.79 ft.)
80 inches
2.55 m (8.37 ft.)
3.07 m (10.07 ft.)
90 inches
2.88 m (9.45 ft.)
3.46 m (11.35 ft.)
100 inches
3.20 m (10.50 ft.)
3.84 m (12.60 ft.)
120 inches
3.84 m (12.60 ft.)
4.62 m (15.16 ft.)
150 inches
4.81 m (15.78 ft.)
5.78 m (18.96 ft.)
200 inches
6.42 m (21.06 ft.)
7.71 m (25.30 ft.)
250 inches
8.03 m (26.35 ft.)
9.65 m (31.66 ft.)
300 inches
9.65 m (31.66 ft.)
11.58 m (37.99 ft.)
PJ WX3131
As seen from above
As seen from the side
Screen
Lens center
a is the distance (m, feet) between the
lens and the screen, and corresponds
to a range of 0.94 m (3.08 ft.) to11.58 m
(37.99 ft.).
The lens center is in the same level with
an image bottom.
