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Ricoh PJ X3131 Manual

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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.)
90°
As seen from above
As seen from the side
Screen
Lens center
a
90°
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
90°
As seen from above
As seen from the side
Screen
Lens center
90°
a
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.
… 21 …


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