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S
F
P E C
I L E
LCD Projector
Formula for calculating the projection distance
To use a projected image size not listed in this manual, check the projected image size SD (m) and use the
respective formula to calculate the value.
The unit of all the formulae is m. (Values obtained by the following calculation formulae contain a slight error.)
When calculating the value using image size designation (value in inches), multiply the value in inches by 0.0254
and substitute it into SD in the formula.
Aspect ratio
Screen height (SH)
Screen width (SW)
Projection distance
(L1)
1
Projection distance
(L2)
Distance between
projector and screen (H)
1 X in the formulas represents the setting value of [DIGITAL ZOOM EXTENDER] (100%=1.00, 95%=0.95, 90%=0.90, 85%=0.85, 80%=0.80,...).
Note
• The value for L (distance to screen) varies slightly within ±5% depending on the zoom lens characteristics.
• When keystone correction is used, the image is corrected in the direction that reduces its projected size.
As of December 2022
CMZ50G_STR_T01_23/12/2022
16 : 10
=0.530 X SD
=0.848 X SD
Without Digital
=0.1782 X SD + 0.0485
Zoom Extender
Digital Zoom
=0.1782 X SD/X + 0.0485
Extender
Without Digital
Zoom Extender
Digital Zoom
Extender
Without Digital
=0.0933 X SD - 0.0562
Zoom Extender
PT-CMZ50
16 : 9
=0.490 X SD
=0.872 X SD
=0.1831 X SD + 0.0485
=0.2017 X SD + 0.0485
=0.1831 X SD/X + 0.0485
=0.2017 X SD/X + 0.0485
=0.0100+(L1-0.4105)
=0.1231 X SD - 0.0562
=0.1056 X SD - 0.0562
TENTATIVE
Unit: meters
4 : 3
=0.6 X SD
=0.8 X SD
9/11
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