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3. Physical installation
SCREEN
SW
PD
Image 3-16
PD for lens selection
3.2.3 Lens formulas
Formulas
Lens
Throw ratio for
CLM
Metric formulas (meter) Inch formulas (inch)
CLD (1.2 - 1.6 : 1)
1.2 - 1.6
PD
min
=1.216 x SW - 0.05
PD
max
=1.657 x SW - 0.097
PD
min
=1.216 x SW - 1.97
PD
max
=1.657 x SW - 3.80
CLD (1.6 - 2.4 : 1)
1.6 - 2.4
PD
min
=1.60 x SW - 0.04
PD
max
=2.38 x SW - 0.11
PD
min
=1.60 x SW - 1.73
PD
max
=2.38 x SW - 4.25
CLD (2.4–4.3 : 1)
2.4 - 4.3
PD
min
=2.42 x SW - 0.09
PD
max
=4.39 x SW - 0.22
PD
min
=2.42 x SW - 3.74
PD
max
=4.39 x SW - 8.75
CAUTION: Never transport the projector with a Lens mounted in the Lens Holder. Always remove the Lens
before transporting the projector. Neglecting this can damage the Lens Holder and Prism.
3.2.4 Lens formulas
Formulas
Lens
Throw ratio for
CLM
Metric formulas (meter) Inch formulas (inch)
CLD (1.2 - 1.5 : 1) 1.25 - 1.58 PD
min
=1.25 x SW - 0.13
PD
max
=1.58 x SW - 0.05
PD
min
=1.25 x SW - 5.12
PD
max
=1.58 x SW - 1.97
CLD (1.5 - 2.2 : 1)
1.57 - 2.36
PD
min
=1.57 x SW - 0.01
PD
max
=2.36 x SW - 0.53
PD
min
=1.57 x SW - 0.39
PD
max
=2.36 x SW - 20.87
CLD (2.2 - 4.4 : 1)
2.24 - 4.45
PD
min
=2.24 x SW - 0.07
PD
max
=4.45 x SW - 0.13
PD
min
=2.24 x SW - 2.76
PD
max
=4.45 x SW - 5.12
CLD (4.4 - 7.0 : 1)
4.40 - 6.92
PD
min
=4.40 x SW - 0.25
PD
max
=6.92 x SW - 0.04
PD
min
=4.40 x SW - 9.84
PD
max
=6.92 x SW - 1.58
CAUTION: Never transport the projector with a Lens mounted in the Lens Holder. Always remove the Lens
before transporting the projector. Neglecting this can damage the Lens Holder and Prism.
R59770021 CLM R10+ 11/10/2010 25