Panasonic PTLC70U Operating Guide

27

■

The picture can be adjusted to the desired size within the range of
the zoom lens. (The values in the table are reference values.)

Screen

size

Setting-up dimensions which are not given in the above table
can be calculated using the formulas below.
If the screen size is SD, then the following formula is first
used to obtain the screen width (SW).

SW (m) = SD x 0.0254   5 x 4

The value for SW obtained above can then be used with the
following functions to calculate the projection distance.

LW (m) = 1.98 x SW
LT  (m) = 2.57 x SW

For 16:9 aspect ratios, the following formula can be used to
calculate the screen width (SW) and the projection distance
for the wide lens position.

SW (m) = SD x 0.0254   18.36 x 16

Throw distance (L)

Height

(SH)

Width

(SW)

Height

position

(H1)

30 in

300 in

40 in

60 in

80 in

100 in

150 in

200 in

250 in

Screen type (4:3)

0.46 m

0.61 m

0.91 m

1.22 m

1.52 m

2.29 m

3.05 m

3.81 m

4.57 m

0.61 m

0.81 m

1.22 m

1.63 m

2.03 m

3.05 m

4.06 m

5.08 m

6.10 m

1.6 m

2.4 m

3.2 m

4.0 m

6.0 m

8.1 m

10.1 m

12.1 m

6.5 cm

8.7 cm

13.1 cm

17.4 cm

21.8 cm

32.7 cm

43.5 cm

54.4 cm

65.3 cm

1.6 m

2.1 m

3.1 m

4.2 m

5.2 m

7.8 m

10.5 m

13.1 m

15.7 m

Wide

(LW)

Telephoto

(LT)