Nikon D500 - Manual (Page 215)

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Active D-Lighting
Active D-Lighting preserves details in highlights and shadows,
creating photographs with natural contrast. Use for high
contrast scenes, for example when photographing brightly lit
outdoor scenery through a door or window or taking pictures of
shaded subjects on a sunny day.
It is most effective when used
with matrix metering ( 0 128).
Preserving Detail in Highlights and
Shadows
Active D-Lighting off Active D-Lighting: Y Auto
A
“Active D-Lighting” versus “D-Lighting”
The Active D-Lighting options in the photo and movie shooting
menus adjust exposure before shooting to optimize the dynamic
range, while the D-Lighting option in the retouch menu (
0 313)
brightens shadows in images after shooting.
D
Active D-Lighting
Noise (randomly-spaced bright pixels, fog, or lines) may appear in
photographs taken with Active D-Lighting. Uneven shading may be
visible with some subjects. Active D-Lighting does not apply at high
ISO sensitivities (Hi 0.3–Hi 5).