Lens Selection - Barco FLM HD18 User Manual

Image 3-11
R9840670: TLD zoom lens (1.6 - 2.0 : 1) ;
R9842060: TLD HB zoom lens (1.6 - 2.0 : 1)
Image 3-14
R9840910: TLD zoom lens (5.0 - 8.0 : 1) ;
R9842120: TLD HB zoom lens (5.0 - 8.0 : 1)
3.2.2

Lens selection

How to select the right lens for your application ?
1. Determine the required screen width (SW).
2. Determine the 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 (see "Lens formulas", page 22) to find the best corresponding PD with regard to the measured projector-
screen distance for the required screen width SW.
Tip: Divide PD by SW to determine the approximately required throw ratio. Choose a lens, which captures the calculated
throw ratio. Use the lens formula of the chosen lens to recalculate exactly.
Image 3-15
R5976986 FLM HD18 01/09/2006
Image 3-12
R9840680: TLD zoom lens (2.0 - 2.8 : 1) ;
R9842080: TLD HB zoom lens (2.0 - 2.8 : 1)
PD
3. Physical installation
Image 3-13
R9840690: TLD zoom lens (2.8 - 5.0 : 1) ;
R9842100: TLD HB zoom lens (2.8 - 5.0 : 1)
21