NEC iS15-2K, Руководство пользователя

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page 2.9
iS15-2K
Cinema Projector: User Manual 2. Installation
Notes
If the mix of images to be
displayed includes images of
varying aspect ratio, then you
should base your choice of lens
on the
widest image that is to
be projected.
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
2.35:1 full width 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 the page immediately
following the lens charts.
Lens charts, continued
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
feet metres feet metres
42 13 98 30
35 11 82 25
28 9 66 20
21 6 49 15
14 4 33 10
7 2 16 5
Screen height Screen wid
th
2.35:1 full width image without anamorphic lens
Where the mix of images to be displayed includes 2.35:1 format, and there is no
anamorphic lens, then:
• all other images will need to be zoomed to 80.6% (871/1080) in order to
maintain the same screen height.
As this is only just within the range of the available zoom lenses, some compromise
will be necessary to pick a suitable screen size.
example
• at a distance of 40m, the 1.45 - 1.8 lens will zoom only from 27.5m to 22m
screen width
• at a distance of 24m, the 3.0 - 4.3 lens will zoom only from 8.0m to 5.5m screen
width