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.)

PJ X3131

Screen As seen from above

90°

As seen from the side

Lens center

90°

a

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 WX3131

Screen As seen from above

90°

As seen from the side

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.

a (min length) = Projection size (inches) - 0.795

 

 

 

 

 

32.885

 

 

 

a (max length) = Projection size (inches) - 0.673

 

 

 

 

 

27.397

 

 

 

 

 

 

 

 

 

Projection

Projection distance a

 

 

 

min length

 

max length

Height (H)

 

 

size

 

 

 

(zooming max)

 

(zooming min)

 

 

Preparations

 

 

 

 

 

 

 

 

 

 

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.)

 

 

a (min length) = Projection size (inches) - 0.758 31.022

a (max length) = Projection size (inches) - 0.643 25.845

Projection

Projection distance a

min length

max length

size

(zooming max)

(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.)

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Ricoh PJ X3241, PJ X3131, PJ WX3131 Projection Distance and Size, Screen As seen from above As seen from the side