Choosing A Lens - Digital Projection E-Vision Laser 13000 WU Series Installation & Quick Start Manual

Digital Projection Ltd. E-Vision Laser 13000 WU Series

Choosing a lens

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
0.377 : 1 fixed (UST) 0.82 m - 2.71 m
0.75 - 0.93 : 1 zoom 1.02 m - 12.7 m
0.76 : 1 fixed 0.81 m - 5.08 m
1.25 - 1.79 : 1 zoom 1.33 m - 11.73 m
1.73 - 2.27 : 1 zoom 1.83 m - 14.9 m
2.22 - 3.67 : 1 zoom 2.36 m - 24.2 m
3.58 - 5.38 : 1 zoom 3.8 m - 35.35 m
5.31 - 8.26 : 1 zoom 5.59 m - 54.8 m
To choose a lens, calculate the throw ratio required. Allow a tolerance of +/- 3% in the throw ratio calculation.
Rev A June 2019
page 94
Lens Shift
Depends on image size, see UST Lens Installation Guide (separate document) 117-341
V: 0.5 (U) 0.3 (D) frame
H: 0.1 (L) 0.2 (R) frame
none
V: 0.5 (U) 0.3 (D) frame
H: 0.1 (L) 0.2 (R) frame
V: 0.5 (U) 0.3 (D) frame
H: 0.1 (L) 0.2 (R) frame
V: 0.5 (U) 0.3 (D) frame
H: 0.1 (L) 0.2 (R) frame
V: 0.5 (U) 0.3 (D) frame
H: 0.1 (L) 0.2 (R) frame
V: 0.5 (U) 0.3 (D) frame
H: 0.1 (L) 0.2 (R) frame
Choosing a lens
Part Number
115-339
112-499
112-500
112-501
112-502
112-503
112-504
Notes
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.
Reference Guide