Canon EOS 50D - Manual (Page 177)

177
3 Custom Function SettingsN
C.Fn II -3 Highlight tone priority
0: Disable
1: Enable
Improves the highlight detail. The dynamic range is expanded from the
standard 18% gray to bright highlights. The gradation between the grays
and highlights becomes smoother.
C.Fn II -4 Auto Lighting Optimizer
If the images comes out dark or the contrast is
low, the brightness and contrast are corrected
automatically. Change the setting as desired. In
the Basic Zone modes, [Standard] is set
automatically.
For RAW images, you can apply the settings
made with Digital Photo Professional (bundled
software).
0: Standard
1: Low
2: Strong
3: Disable
With setting 1, noise in the shadow areas may be slightly more than usual.
With setting 1, the settable ISO speed range will be 200 - 3200.
Also, (dynamic range) will be displayed on the LCD panel and in the
viewfinder.
Ð
This will not work if manual exposure has been set.
Depending on the shooting conditions, the noise may increase.
COP
Y