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Digital Projection INSIGHT 4K Dual LED & Quad Series
Calculation
Identify the required lens by calculating the throw ratio.
A throw ratio is the ratio of the throw distance
to the screen width
:
2
Throw distance
Throw ratio =
Screen width
1.
Use the formula above to obtain the required throw ratio.
2.
Match the throw ratio with a lens from the table below:
Throw ratios
Throw distance range
0.93 : 1 fixed lens
0.5 m - 40 m (1.6 ft - 130 ft)
1.13 - 1.72 : 1 zoom lens
2.5 m - 40+ m (8.2 ft - 130+ ft) at 1.13:1
0.5 m - 40+ m (1.6 ft - 130+ ft) at 1.72:1
1.65 - 2.60 : 1 zoom lens
3.5 m - 40+ m (11.5 ft - 130+ ft) at 1.65:1
1.0 m - 40+ m (3.3 ft - 130+ ft) at 2.60:1
2.53 - 4.98 : 1 zoom lens
1.5 m - 40+ m (4.9 ft - 130+ ft) at 2.53:1
4.5 m - 40+ m (14.8 ft - 130+ ft) at 4.98:1
3.
Ensure the required throw distance is within the range covered by the
lens.
Reference Guide
CHOOSING A LENS
1
1
2
Notes
When calculating the throw ratio, be
sure to use identical measurement
units for both the throw distance and
the screen width.
You can also use the information
in
Appendix B: Lens Charts
to
choose a lens.
For information about individual lens
part numbers, see
Appendix A:
Lens Part Numbers
at the end of
this document.
Rev B June 2016
page 46
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