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Appendix G
Lenses
This appendix describes the relationship between lens type, screen size and throw distance as they apply to
the projector. Please contact your dealer or Madrigal Imaging for additional assistance.
MP-8
MP-9
HD-8
HD-10GT17
TypeSeries FactoryFrom To
60"
60"
120"
120"
From To
76.2"
77.2"
155.5"
154.3"
84"
84"
PROJECTOR LENS SCREEN WIDTH
RANGE
THROW DISTANCE
RANGE
THROW
DISTANCE
FORMULA
1.33
SCREEN
1.2875 x W + 1
1.286 x W
THROW
DISTANCE
FORMULA
1.78
SCREEN
1.253 x W + 1
1.252 x W
G.1
Notes: 1) “Factory” refers to the throw distance used at the factory for optical setup and testing.
2) All diagonal screen sizes are based on a 4:3 aspect ratio. “W” in the throw distance formula
represents horizontal screen width. All dimensions are in inches.
3) Calculated values are for reference only. It is good practice to simulate the setup to determine
the necessary throw distance.