Digital Projection E-Vision Laser 15000 Series
Appendix B: Choosing a lens
Appendix B: Choosing a lens
Throw distance calculations are
based on the distance from the
outer end of the lens, which varies
from lens to lens.
The lens extension is the distance
between the front of the projector
chassis and the outer end of the
lens when it is fully extended.
Refer to the projector CAD
drawings for individual lens
extension figures.
The
0.377 : 1 fixed lens
has no
adjustable shift value. However,
the lens has an inherent offset
depending on image size. See the
UST documentation published
separately on the Digital Projection
website.
The
0.75 - 0.93 : 1 zoom lens
has a feature that permits focus
correction for curved screens. The
front ring of the lens is a manual
control that provides focus
curvature adjustment to correct for
the different focal distances
between center and corner.
See Fitting a lens hood on page 23
for more information about using
the right lens and hood
A number of lenses are available. Which lens you choose depends on the screen size, image aspect ratio, throw distance and light output.
The following table shows all available lenses in order of their throw ratios:
Throw Ratio Focus Range
Lens Shift
Part Number
0.377 : 1 fixed (UST) 0.82 m - 2.71 m
Depends on image size, see
UST Lens Installation Guide
(separate document) 117-341
0.75 - 0.93 : 1 zoom 1.02 m - 12.7 m
V: 0.5 (U) 0.3 (D) frame
H: 0.1 (L) 0.2 (R) frame
115-339
0.76 : 1 fixed
0.81 m - 5.08 m
none
112-499
1.25 - 1.79 : 1 zoom 1.33 m - 11.73 m
V: 0.5 (U) 0.3 (D) frame
H: 0.1 (L) 0.2 (R) frame
112-500
1.73 - 2.27 : 1 zoom 1.83 m - 14.9 m
V: 0.5 (U) 0.3 (D) frame
H: 0.1 (L) 0.2 (R) frame
112-501
2.22 - 3.67 : 1 zoom 2.36 m - 24.2 m
V: 0.5 (U) 0.3 (D) frame
H: 0.1 (L) 0.2 (R) frame
112-502
3.58 - 5.38 : 1 zoom 3.8 m - 35.35 m
V: 0.5 (U) 0.3 (D) frame
H: 0.1 (L) 0.2 (R) frame
112-503
5.31 - 8.26 : 1 zoom 5.59 m - 54.8 m
V: 0.5 (U) 0.3 (D) frame
H: 0.1 (L) 0.2 (R) frame
112-504
To choose a lens, calculate the
throw ratio
required. Allow a tolerance of +/- 3% in the throw ratio calculation.
Rev B April 2021
page 112
Reference Guide
Notes