Calculating Trc; Trc Table; Calculating The Throw Ratio With Trc - Digital Projection TITAN LASER WUXGA Installation & Quick Start Manual

Digital Projection Ltd. Titan Laser WUXGA

Calculating TRC

To calculate TRC, use the following formula:

TRC table

Alternatively, you can save time by referencing the following table, which shows the TRC value for some popular image formats:
2.35:1 (Scope) 1920 x 817 pixels TRC < 1, not used
1.85:1 (Flat) 1920 x 1037 pixels TRC < 1, not used
1.78:1 (16:9) 1920 x 1080 pixels TRC < 1, not used
1.6:1 (16:10) 1920 x 1200 pixels TRC < 1, not used (native aspect ratio)
1.33:1 (4:3) 1596 x 1200 pixels TRC = 1.2
1.25:1 (5:4) 1500 x 1200 pixels TRC = 1.28

Calculating the throw ratio with TRC

1. For TRC > 1, amend the basic throw ratio formula as follows:
Allow a tolerance of +/- 2% in the throw ratio calculation.
2. Once a throw ratio is established, identify the matching lens from the table:
Throw ratios
0.67: 1 Super Wide fixed
1.12 : 1 Wide Fixed
1.16-1.49:1 Super Wide Zoom 3m - 15m
1.39 - 1.87:1 Wide Zoom
1.87 - 2.56:1 Standard Zoom
2.56 - 4.16:1 Semi Long Zoom 9.1m - 45m
4.16 - 6.96:1 Long Zoom1
6.92 - 10.36:1 Long Zoom2
3. Ensure the required throw distance is within the range of the matching lens.
The lens table shown on this page includes High Brightness lenses only. For a full list, see Appendix A.
Rev A January 2019
page 106
Focus Range
1.1m - 10m
3m - 15m
4m - 24m
4m - 24m
12m - 80m
12m - 80m
Choosing a lens
Notes
TRC can only be applied if
greater than 1. If TRC is 1
or less, disregard it and
calculate the throw ratio
using the basic formula.
TRC can only be applied if
greater than 1. If TRC is 1
or less, disregard it and
calculate the throw ratio
using the basic formula
See Fitting a lens hood on
page 27 for more
information about using
the right lens and hood
Reference Guide