NEC NC800C Installation Manual page 11

NC800C
How to Calculate the Magnification of Primary Lens
SCOPE projection:
Primary lens
magnification =
Use 1x for anamorphic lens magnification if this lens is not in use.
VISTA (FLAT) /HDTV projection:
Primary lens
magnification =
* Number of pixels per horizontal line: 1998 for VISTA (FLAT); 1920 for HDTV
* Select a lens that meets the magnification requirement for both SCOPE and VISTA
(FLAT)/HDTV screen types.
Example of Primary Lens Calculation
If the projection distance (L) = 16 m, the screen width (W) = 8 m and the anamorphic
lens is not used:
SCOPE projection =
VISTA (FLAT) projection =
HDTV projection =
Therefore, "L2K-18ZM", which satisfies the magnifications in all of the above projections,
is selected as the primary lens.
Length of projection (L)
Screen width (W) ÷ Anamorphic lens magnification
Length of projection (L)
Screen width (W) × (2048 ÷ Number of pixels per horizontal line)
16m
8m÷1
16m
8m×(2048÷1998)
16m
8m×(2048÷1920)
1. Before Setting Up Your Projector
= 2.0x
= 1.95x
= 1.88x
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