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Digital Projection M-Vision Laser 18K Series
Reference Guide
CHOOSING A LENS
Rev D October 2019
Choosing A Lens
A number of lenses are available. Which lens you choose depends on the screen size, image aspect ratio, throw distance and light output.
The following table shows all available lenses in order of their throw ratios:
Throw ratios Focus range Lens shift
1.20 - 1.56 : 1 zoom 1 m - 8 m V: 0.5 (U) 0.5 (D) frame
H: 0.15 (L) 0.15 (R) frame
1.50 - 2.00 : 1 zoom 2 m - 12 m V: 0.5 (U) 0.3 (D) frame
H: 0.15 (L) 0.15 (R) frame
2.00 - 4.00 : 1 zoom 2.5 m - 15 m V: 0.5 (U) 0.3 (D) frame
H: 0.15 (L) 0.15 (R) frame
4.00 - 7.00 : 1 zoom 4 m - 42 m V: 0.5 (U) 0.3 (D) frame
H: 0.15 (L) 0.15 (R) frame
To choose a lens, calculate the throw ratio required.
Notes
Throw distance calculations are
based on the distance from the outer
end of the lens, which will vary from
lens to lens.
The distance between the front
of the projector chassis and the
outer end of the lens is called lens
extension. Lens extensions is
measured when the lens is focused
at infi nity, and fully extended.
Refer to the projector CAD drawings
for individual lens extension fi gures.
For information about individual lens
part numbers, see Appendix A at
the end of this document.
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