NEC iS15-2K, User Manual

Page: 30 / 90

page 2.14
2. Installation
iS15-2K
Cinema Projector: User Manual
Notes
For an example of how to use
the lens charts, see the first
chart.
The lenses available and their
part numbers are listed below:
1.45 - 1.8: 1 zoom lens 102-933
1.8 - 2.4: 1 zoom lens 102-934
(note: these two lenses overlap)
2.2 - 3.0: 1 zoom lens 102-935
3.0 - 4.3: 1 zoom lens 102-936
Lens charts, continued
5:4 full height image, no anamorphic lens
Use the chart below to choose which lens best suits your application.
if you need to be more precise, then use the calculations on page 5:
10 15 20 25 30 35 40 45 metres
33 49 66 82 98 115 131 148 feet
Throw distance
TRF (see page 15) = 1.52
feet metres feet metres
78 24 98 30
66 20 82 25
53 16 66 20
39 12 49 15
26 8 33 10
13 4 16 5
Screen height Screen wid
th