Selecting The Lens Unit; Screen Type - NEC NC900C Installation Manual

1-3. Selecting the lens unit

This section provides the guideline information on how to select a screen size, projector mounting position, and type of lens
units, which is appropriate for your presentation purposes. Select the lens unit for your projector according to the environment
in which it is installed.
Note that all descriptions given in this manual assume that the angle of projection is zero degree. In case of projection from an
upper position or from the right or left, it is necessary to calculate the width for the minimum projected image that is a little
larger than the screen size.

1-3-1. Screen Type

The following two types of screen masks can be used for the DLP Cinema Projector. Check the screen mask for your projector
for its type before selecting lens units, because types of lens units to be used on the projector and its settings depend upon
the type of screen mask you use.
Horizontal moving screen mask
Screen masks move horizontally to adjust the screen.
Screen mask
Width of minimum
Screen
Before Setting Up Your Projector
Screen
Projected image
Screen mask
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