Nikon D3100 Reference Manual page 102

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.
A
"Active D-Lighting" Versus "D-Lighting"
The Active D-Lighting option in the shooting menu adjusts exposure before shooting to
optimize the dynamic range, while the D-Lighting option in the retouch menu (0 153)
optimizes dynamic range in images after shooting.
A
The Shooting Menu
Active D-Lighting can also be adjusted using the Active D-Lighting
option in the shooting menu (0 131).
A
See Also
For information on using the Fn button and command dial to turn Active D-Lighting on and
off, see page 146.
t
86