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Calculation of the projection distance
For a screen size different from the above, use the equation below to calculate the projection distance.
• Distances calculated with the above equations will include a slight error.
minimum L (m) = (diagonal screen size in inches) × 0.026816 - 0.055497
maximum L (m) = (diagonal screen size in inches) × 0.036511 - 0.053400
minimum L (m) = (diagonal screen size in inches) × 0.035305 - 0.054882
maximum L (m) = (diagonal screen size in inches) × 0.060045 - 0.048228
minimum L (m) = (diagonal screen size in inches) × 0.060102 - 0.114022
maximum L (m) = (diagonal screen size in inches) × 0.098001 - 0.112874
minimum L (m) = (diagonal screen size in inches) × 0.098214 - 0.212284
maximum L (m) = (diagonal screen size in inches) × 0.155996 - 0.210772
(fixed focus) L (m) = (diagonal screen size in inches) × 0.017178 - 0.057678
ET-ELW20
Supplied lens
ET-ELT20
ET-ELT21
ET-ELW21
Aspect ratio 16:9
Aspect ratio 16:10
minimum L (m) = (diagonal screen size in inches) × 0.027561 - 0.055497
maximum L (m) = (diagonal screen size in inches) × 0.037526 - 0.053400
minimum L (m) = (diagonal screen size in inches) × 0.036286 - 0.054882
maximum L (m) = (diagonal screen size in inches) × 0.061714 - 0.048228
minimum L (m) = (diagonal screen size in inches) × 0.061773 - 0.114022
maximum L (m) = (diagonal screen size in inches) × 0.100725 - 0.112874
minimum L (m) = (diagonal screen size in inches) × 0.100944 - 0.212284
maximum L (m) = (diagonal screen size in inches) × 0.160333 - 0.210772
(fixed focus) L (m) = (diagonal screen size in inches) × 0.017656 - 0.057678
ET-ELW20
Supplied lens
ET-ELT20
ET-ELT21
ET-ELW21
PT-EZ580/EZ580L
LCD Projectors
As of March 2014 9/17
SFL13M011