Panasonic PT-EZ770Z Operating Instructions Manual page 39

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-EZ770Z
Lens type
Standard zoom lens
Fixed-focus lens
Short focus zoom lens
Long focus zoom lens
Ultra long focus zoom lens
For PT-EW730Z
Lens type
Standard zoom lens
Fixed-focus lens
Short focus zoom lens
Chapter 2 Getting Started — Setting up
Projection Lens
Aspect ratio
Model No.
16:10
— 16:9
4:3
16:10
ET-ELW21 16:9
4:3
16:10
ET-ELW20 16:9
4:3
16:10
ET-ELT20 16:9
4:3
16:10
ET-ELT21 16:9
4:3
Projection Lens
Aspect ratio
Model No.
16:10
— 16:9
4:3
16:10
ET-ELW21 16:9
4:3
16:10
ET-ELW20 16:9
4:3
Projection distance (L) formula
Min. (LW) L = 1.3900 x SD - 0.0549
Max. (LT) L = 2.3640 x SD - 0.0482
Min. (LW) L = 1.4286 x SD - 0.0549
Max. (LT) L = 2.4297 x SD - 0.0482
Min. (LW) L = 1.5736 x SD - 0.0549
Max. (LT) L = 2.6763 x SD - 0.0482
— L = 0.6763 x SD - 0.0577
— L = 0.6951 x SD - 0.0577
— L = 0.7656 x SD - 0.0577
Min. (LW) L = 1.0557 x SD - 0.0555
Max. (LT) L = 1.4374 x SD - 0.0534
Min. (LW) L = 1.0851 x SD - 0.0555
Max. (LT) L = 1.4774 x SD - 0.0534
Min. (LW) L = 1.1952 x SD - 0.0555
Max. (LT) L = 1.6273 x SD - 0.0534
Min. (LW) L = 2.3662 x SD - 0.1140
Max. (LT) L = 3.8583 x SD - 0.1129
Min. (LW) L = 2.4320 x SD - 0.1140
Max. (LT) L = 3.9656 x SD - 0.1129
Min. (LW) L = 2.6788 x SD - 0.1140
Max. (LT) L = 4.3680 x SD - 0.1129
Min. (LW) L = 3.8667 x SD - 0.2123
Max. (LT) L = 6.1416 x SD - 0.2108
Min. (LW) L = 3.9742 x SD - 0.2123
Max. (LT) L = 6.3123 x SD - 0.2108
Min. (LW) L = 4.3775 x SD - 0.2123
Max. (LT) L = 6.9529 x SD - 0.2108
Projection distance (L) formula
Min. (LW) L = 1.4062 x SD - 0.0504
Max. (LT) L = 2.3944 x SD - 0.0497
Min. (LW) L = 1.4452 x SD - 0.0504
Max. (LT) L = 2.4609 x SD - 0.0497
Min. (LW) L = 1.5919 x SD - 0.0504
Max. (LT) L = 2.7106 x SD - 0.0497
— L = 0.6842 x SD - 0.0572
— L = 0.7032 x SD - 0.0572
— L = 0.7746 x SD - 0.0572
Min. (LW) L = 1.0702 x SD - 0.0554
Max. (LT) L = 1.4530 x SD - 0.0534
Min. (LW) L = 1.1000 x SD - 0.0554
Max. (LT) L = 1.4934 x SD - 0.0534
Min. (LW) L = 1.2116 x SD - 0.0554
Max. (LT) L = 1.6449 x SD - 0.0534
ENGLISH - 39