Selecting The Lens Unit - NEC PH3501QL Installationsanleitung

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. Many types of optical lens for the projector are
available for separate sale to support various projection range.
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.
Minimum
height
Projection from the left
1. Before Setting Up Your Projector
Minimum width
Screen
Projected
image
Projection from an upper position
5
Screen
Projected
image