Calculating The Lens Zoom Magnification To Use - NEC NC900C Installation Manual

1-3-2. Calculating the lens zoom magnification to use

The lens zoom magnification required when installing the projector is calculated using the following method.
(1) Calculate the lens zoom magnification for SCOPE projection
(2) Calculate the lens zoom magnification for VISTA (FLAT) and HDTV projection
(3) Select the lens that satisfies the zoom magnification calculated in (1) and (2).
SCOPE projection:
Primary lens Length of projection (L)
=
Screen width (W)
magnification
VISTA (FLAT)/HDTV projection:
Primary lens
=
magnification Screen width (W) × (2048 ÷ Number of pixels per horizontal line)
Note: Number of pixels per horizontal line: 1998 for VISTA (FLAT); 1920 for HDTV
Select a lens that meets the magnification requirement for SCOPE, VISTA (FLAT), and HDTV screen types.
Projector
Length of projection (L)
Screen
Before Setting Up Your Projector
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