Calculating The Lens Zoom Magnification To Use - NEC NC1700L Installation Manual

Before Setting Up Your Projector and the Chiller Unit

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:
Lens Length of projection (L)
=
magnification
VISTA (FLAT)/HDTV projection:
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
40
Screen width (W)
Length of projection (L)
Screen