Chapter 2 Getting Started — Setting up

Formula to calculate projection distance per projection lens

To use a screen size not listed in this manual, check the screen size SD (m) and use the respective formula to calculate projection distance. The unit of all the formulae is m. (Values obtained by the following calculation formulae contain a slight error.)

For PT‑DZ13KU, PT‑DZ10KU

rrZoom lens

Projection lens Model No.

Throw ratioAspect ratio

 

Projection distance (L) formula

 

1.4 to 1.8:1

16:10

Min. (LW)

 

L = 1.1732 x SD - 0.0760

 

Max. (LT)

 

L = 1.5709 x SD - 0.1004

 

 

 

 

ET‑D75LE1

1.4 to 1.8:1

16:9

Min. (LW)

 

L = 1.2087 x SD - 0.0760

Max. (LT)

 

L = 1.6142 x SD - 0.1004

 

 

 

 

 

1.6 to 2.2:1

4:3

Min. (LW)

 

L = 1.3307 x SD - 0.0760

 

Max. (LT)

 

L = 1.7756 x SD - 0.1004

 

 

 

 

 

1.8 to 2.8:1

16:10

Min. (LW)

 

L = 1.5748 x SD - 0.0795

 

Max. (LT)

 

L = 2.3661 x SD - 0.1064

 

 

 

 

ET‑D75LE2

1.8 to 2.8:1

16:9

Min. (LW)

 

L = 1.6220 x SD - 0.0795

Max. (LT)

 

L = 2.4291 x SD - 0.1064

 

 

 

 

 

2.2 to 3.3:1

4:3

Min. (LW)

 

L = 1.7835 x SD - 0.0795

 

Max. (LT)

 

L = 2.6772 x SD - 0.1064

 

 

 

 

 

2.8 to 4.6:1

16:10

Min. (LW)

 

L = 2.3661 x SD - 0.0958

 

Max. (LT)

 

L = 3.9488 x SD - 0.1216

 

 

 

 

ET‑D75LE3

2.8 to 4.6:1

16:9

Min. (LW)

 

L = 2.4291 x SD - 0.0958

Max. (LT)

 

L = 4.0591 x SD - 0.1216

 

 

 

 

 

3.3 to 5.5:1

4:3

Min. (LW)

 

L = 2.6772 x SD - 0.0958

 

Max. (LT)

 

L = 4.4724 x SD - 0.1216

 

 

 

 

 

4.6 to 7.4:1

16:10

Min. (LW)

 

L = 3.9488 x SD - 0.1158

 

Max. (LT)

 

L = 6.2795 x SD - 0.1013

 

 

 

 

ET‑D75LE4

4.6 to 7.4:1

16:9

Min. (LW)

 

L = 4.0591 x SD - 0.1158

Max. (LT)

 

L = 6.4528 x SD - 0.1013

 

 

 

 

 

5.6 to 8.9:1

4:3

Min. (LW)

 

L = 4.4724 x SD - 0.1158

 

Max. (LT)

 

L = 7.1102 x SD - 0.1013

 

 

 

 

 

7.3 to 13.8:1

16:10

Min. (LW)

 

L = 6.2795 x SD - 0.3862

 

Max. (LT)

 

L = 11.7677 x SD - 0.3598

 

 

 

 

ET‑D75LE8

7.3 to 13.8:1

16:9

Min. (LW)

 

L = 6.4567 x SD - 0.3862

Max. (LT)

 

L = 12.0945 x SD - 0.3598

 

 

 

 

 

8.8 to 16.5:1

4:3

Min. (LW)

 

L = 7.1102 x SD - 0.3862

 

Max. (LT)

 

L = 13.3189 x SD - 0.3598

 

 

 

 

 

0.9 to 1.1:1

16:10

Min. (LW)

 

L = 0.7913 x SD - 0.0566

 

Max. (LT)

 

L = 0.9488 x SD - 0.0736

 

 

 

 

ET‑D75LE6

0.9 to 1.1:1

16:9

Min. (LW)

 

L = 0.8150 x SD - 0.0566

Max. (LT)

 

L = 0.9764 x SD - 0.0736

 

 

 

 

 

1.1 to 1.3:1

4:3

Min. (LW)

 

L = 0.8976 x SD - 0.0566

 

Max. (LT)

 

L = 1.0748 x SD - 0.0736

 

 

 

 

 

1.3 to 1.7:1

16:10

Min. (LW)

 

L = 1.1186 x SD - 0.0857

 

Max. (LT)

 

L = 1.4458 x SD - 0.1085

 

 

 

 

ET‑D75LE10

1.3 to 1.7:1

16:9

Min. (LW)

 

L = 1.1497 x SD - 0.0857

Max. (LT)

 

L = 1.4860 x SD - 0.1085

 

 

 

 

 

1.6 to 2.0:1

4:3

Min. (LW)

 

L = 1.2663 x SD - 0.0857

 

Max. (LT)

 

L = 1.6367 x SD - 0.1085

 

 

 

 

 

1.7 to 2.4:1

16:10

Min. (LW)

 

L = 1.4312 x SD - 0.0832

 

Max. (LT)

 

L = 2.0795 x SD - 0.1162

 

 

 

 

ET‑D75LE20

1.7 to 2.4:1

16:9

Min. (LW)

 

L = 1.4709 x SD - 0.0832

Max. (LT)

 

L = 2.1373 x SD - 0.1162

 

 

 

 

 

2.0 to 2.9:1

4:3

Min. (LW)

 

L = 1.6202 x SD - 0.0832

 

Max. (LT)

 

L = 2.3542 x SD - 0.1162

 

 

 

 

42 - ENGLISH