NEC NC900C - Calculating the Lens Zoom Magnification to Use

21
Before Setting Up Your Projector
1-3-2. Calculating the lens zoom magnication 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
magnification
=
Length of projection (L)
Screen width (W)
VISTA (FLAT)/HDTV projection:
Primary lens
magnification
=
Length of projection (L)
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.
Screen width (W)
Screen height (H)
Projector
Length of projection (L)
Screen
Length centerline
Centerlines