Table of Contents
Advertisement
Digital Projection INSIGHT 4K Dual LED & Quad Series
Calculation example
1.
Calculate the throw ratio using the formula.
Your screen is 4.5 m wide and you wish to place your
projector approximately 11 m from the screen. The throw
ratio will then be
11
= 2.44
4.5
2.
Match the result with the lens table.
The lens matching a throw ratio of 2.44 is:
•
the 1.65 - 2.60 : 1 zoom lens
3.
Check whether the lens covers the required throw
distance.
11 m is comfortably within the throw range of the
1.65-2.60:1 lens.
Reference Guide
CHOOSING A LENS
INFORMATION YOU NEED FOR THIS CALCULATION
•
The throw ratio formula:
Throw distance
Throw ratio =
Screen width
•
The lens table:
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
Notes
You can also use the information
Appendix B: Lens Charts
in
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 47
Advertisement
Table of Contents
