Nikon D5200 Reference Manual page 87

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
can not be used at ISO sensitivities of Hi 0.3 or above. A setting of Y Auto is equivalent to
Q Normal in mode M or when center-weighted or spot metering is used.
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"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 (0 180)
brightens shadows in images after shooting.
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The Shooting Menu
Active D-Lighting can also be adjusted using the Active D-Lighting
option in the shooting menu (0 150).
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See Also
For information on automatically varying Active D-Lighting over a series of shots, see page
83. For information on using the Fn button and command dial to select an Active
D-Lighting option, see page 165.
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