Barco R9001490 - Manual (Page 21)

3-7
Installation Guidelines
5976072 BARCO ELM R12 17102000
Lenses
Which Lens has to be selected.
1 Determine the required screen width.
2 Determine the approximate position of the projector in the projection room with regard to the screen and measure the
projector-screen distance (PD).
3 Use the lens formulas to find the best corresponding PD with regard to the measured projector-screen distance for the required
screen width.
The desired lens is determined (the order number is given in the tabel).
Available lenses
QLD lenses :
Name Lens Lenght mm (inch) Diameter mm (inch) Weight kg (lbs) Order number
QLD (1.5-2.0:1) 329 183 R9840130
QLD (2.0-2.5:1) 335.5 160 R9840140
QLD (2.5-4.0:1) 285.7 155 R9840150
QLD (4.0-7.0:1) 383 144.5 R9840160
QLD (5.6-12.0:1) R9840430
QLD (1.2:1) 447 183 R9840120
Remark : When using these lenses with the ELM G10, the throw ratio is these for the ELM R12 x 1.25.
LD lenses :
Name Lens Lenght mm (inch) Diameter mm (inch) Weight kg (lbs) Order number
LD (0.8:1) R9840420
LD (1.5-2.5:1) R9840090
LD (2.5-4.0:1) R9840270
LD (4.0-7.0:1) R9840280
Remark : These lenses can only be used in combination with an adaptor ring.
Lens formulas to calculate the projector distance
For QLD lenses :
Metric formulas (meter) Inch formulas (inch)
QLD (1.5-2.0:1) Min : PD = 1.53 x SW - 0.05 Min : PD = 1.53 x SW - 1.97
Max : PD = 2.05 x SW - 0.07 Max : PD = 2.05 x SW - 2.76
QLD (2.0-2.5:1) Min : PD = 2.04 x SW - 0 Min : PD = 2.04 x SW - 0
Max : PD = 2.51 x SW - 0.02 Max : PD = 2.51 x SW - 0.79
QLD (2.5-4.0:1) Min : PD = 2.50 x SW - 0.12 Min : PD = 2.50 x SW - 4.72
Max : PD = 4.01 x SW - 0.20 Max : PD = 4.01 x SW - 7.87
QLD (4.0-7.0:1) Min : PD = 3.99 x SW - 0.05 Min : PD = 3.99 x SW - 1.97
Max : PD = 7.04 x SW - 0.23 Max : PD = 7.04 x SW - 9.06
QLD (5.6-12.0:1) Min : PD = 5.64 x SW ± 0.15 Min : PD = 5.64 x SW ± 5.9
Max : PD = 12.0 x SW ± 0.15 Max : PD = 12.0 x SW ± 5.9
QLD (1.2:1) PD = 1.24 x SW - 0.08 PD = 1.24 x SW - 3.14
For LD lenses :
Metric formulas (meter) Inch formulas (inch)
LD (0.8:1) PD = 0.64 x SW - 0.03 PD = 0.64 x SW - 1.18
LD (1.5-2.5:1) Min : PD = 1.19 x SW - 0.01 Min : PD = 1.19 x SW - 0.39
Max : PD = 2.01 x SW - 0.05 Max : PD = 2.01 x SW - 1.97
LD (2.5-4.0:1) Min : PD = 1.97 x SW - 0.01 Min : PD = 1.97 x SW - 0.39
Max : PD = 3.17 x SW - 0.05 Max : PD = 3.17 x SW - 1.97
LD (4.0-7.0:1) Min : PD = 3.16 x SW - 0.10 Min : PD = 3.16 x SW - 3.93
Max : PD = 5.56 x SW - 0.17 Max : PD = 5.56 x SW - 6.69
Note : Lens program to calculate the projector distance is available on the BARCO webside :
http://www.barco.com/projecti/cusserv/index.htm
The lens program can also be ordered on floppy or CD.