Digital Projection Lightning 30sx+m, 40sx+m User Manual

page 2.3       105-681B January 2007
Digital Projection LIGHTNING 30sx+m, 40sx+m User Manual 2. Installation
Fitting the image to the screen
It is important that your screen is of sufficient height and width to display images at
all the aspect ratios you are planning to use.
Use the conversion chart, or the sample calculations below to check that you are
able to display the full image on your screen. If you have insufficient height or width,
you will have to reduce the overall image size in order to...

page 2.4       105-681B January 2007
2. Installation Digital Projection LIGHTNING 30sx+m, 40sx+m User Manual
Positioning the screen and projector
For optimum viewing, the screen should be a flat surface perpendicular to the floor.
The bottom of the screen should be 1.2m (4 feet) above the floor and the front row
of the audience should not have to look up more than 30° to see the top of the
screen.
The distance between the front row of the audience and the screen should be at
least twice the screen height...

page 2.5       105-681B January 2007
Digital Projection LIGHTNING 30sx+m, 40sx+m User Manual 2. Installation
Notes
For more information about
Throw ratio factor (TRF), see
Useful lens calculations, later
in this section.
Choosing a lens
A number of lenses are available for use with the projector. Which lens you choose
will depend on the screen size, image aspect ratio and projection distance.
If you are simply connecting the output of a camera or computer directly to the
projector, then the image size...

page 2.6       105-681B January 2007
2. Installation Digital Projection LIGHTNING 30sx+m, 40sx+m User Manual
Notes
This chart has a TRF of 1.0, for
use with the following images:
Choosing a lens using the lens charts
Full width images
Use the chart below to choose which lens best suits your application.
example
• For a screen width of 10m at a distance of 35m, the 2.77 - 4.51: 1 zoom lens
(107-146) would be best suited.
• For the same screen size at a distance of 60m, the 4.51 - 7.53: 1 lens (107-147)...

page 2.7       105-681B January 2007
Digital Projection LIGHTNING 30sx+m, 40sx+m User Manual 2. Installation
Notes
This chart has a TRF of 1.07,
for use with the following image:
5:4 full height image (TRF = 1.07)
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.
Screen width
               10             20              30             40             50             60...

page 2.8       105-681B January 2007
2. Installation Digital Projection LIGHTNING 30sx+m, 40sx+m User Manual
Notes
The Throw ratio for a particular
lens is fixed, but assumes that
the image fills the width of the
DMD.
For images that do not fill the
width of the DMD, the Throw
ratio is effectively increased. To
correct for this in these
calculations, a Throw Ratio
Factor (TRF) is used.
The lenses available and their
part numbers are listed below:
0.73 : 1 fixed lens 107-141
1.2 : 1 fixed lens (3 - 15m)...

page 2.9       105-681B January 2007
Digital Projection LIGHTNING 30sx+m, 40sx+m User Manual 2. Installation
Notes
The Throw ratio for a particular
lens is fixed, but assumes that
the image fills the width of the
DMD.
For images that do not fill the
width of the DMD, the Throw
ratio is effectively increased. To
correct for this in these
calculations, a Throw Ratio
Factor (TRF) is used.
Lens extension is measured
when the lens is focussed at
infinity, and fully extended. At
other focus settings, the...

page 2.10       105-681B January 2007
2. Installation Digital Projection LIGHTNING 30sx+m, 40sx+m User Manual
Notes
Each time a new lens is fitted
to the projector, the
calibration procedure must
be carried out. See Lens
menu, in Section 4. Using the
menus.
Make sure the rear lens cap is
removed, before fitting the lens.
Be careful not to scratch the
lens surfaces. If you do
accidentally touch a lens, then
clean the surface using a lens
paper.
The zoom drive mechanism
should always be set to the
engaged...

page 2.11       105-681B January 2007
Digital Projection LIGHTNING 30sx+m, 40sx+m User Manual 2. Installation
Notes
For more information on using
the Lens shift feature, see
section 4. Using the menus,
Lens menu.
If the lens is to be shifted in two
directions combined, the
maximum range is somewhat
less, as can be seen below.
full horizontal and vertical shift
without distortion
combined shift without distortion
is reduced
Shifting the image
The normal position for the projector is at the centre of the...

page 2.12       105-681B January 2007
2. Installation Digital Projection LIGHTNING 30sx+m, 40sx+m User Manual
Notes
BEFORE INSTALLING THE
PROJECTOR, READ ALL THE
WARNINGS BELOW AND ALL
THOSE IN IMPORTANT
INFORMATION AT THE
FRONT OF THIS MANUAL.
The projector weighs over
100kg (200lbs). Use safe
handling techniques when
lifting the projector.
Make sure that the surface,
ceiling or rigging that is to
support the projector is
capable of supporting the
combined weight of the
projector and lens (see...