page 71
Digital Projection HIGHlite Cine 330 3D Series
Reference Guide
CHOOSING A LENS
Rev E August 2014
Choosing A Lens
A number of lenses are available. Which lens you choose will depend on the screen size, image aspect ratio, projection distance and light
output. In addition, each lens is available in two versions: High Brightness and High Contrast.
The lenses available are listed below:
Lens
0.77 : 1 fixed lens
1.16 : 1 fixed lens
1.45 - 1.74 : 1 zoom lens
1.74 - 2.17 : 1 zoom lens
2.17 - 2.90 : 1 zoom lens
2.90 - 4.34 : 1 zoom lens
4.34 - 6.76 : 1 zoom lens
If the image does not fill the full width of the DMD™, this effectively increases the throw ratio of the lens. This can be corrected by applying a
throw ratio factor (TRF).
To choose a lens for your projector, you can either apply a lens calculation, or use the lens charts provided here for quick reference.
Notes
The High Brightness lenses are
recommended for the HB model, for
maximum light output.
The High Contrast lenses are
recommended for the HC model, for
maximum contrast.
For more information about throw
ratio factor (TRF), see
Choosing
a lens by calculation
later in this
section.
For information about individual lens
part numbers, see
Appendix A
at
the end of this document.
