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Digital Projection INSIGHT 4K Dual LED & Quad Series
Reference Guide
CHOOSING A LENS
Rev B June 2016
Calculation
Identify the required lens by calculating the
throw ratio
.
A
throw ratio
is the ratio of the
throw distance
1
to the
screen width
2
:
Throw distance
Screen width
Throw ratio =
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.
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
to
choose a lens.
For information about individual lens
at the end of
this document.
1
2
