Sony ILCA-99M2 - Manual (Page 172)

If you change [Gamma], the available ISO value range changes.
There may be more noise in dark parts depending on the gamma settings. It may improve by setting
the lens compensation to [Off].
When using S-Log2 or S-Log3 gamma, the noise becomes more noticeable compared to when using
other gammas. If the noise still is significant even after processing pictures, it may be improved by
shooting with a brighter setting. However, the dynamic range becomes narrower accordingly when
you shoot with a brighter setting. We recommend checking the picture in advance by test shooting
when using S-Log2 or S-Log3.
Setting [ITU709(800%)], [S-Log2] or [S-Log3] may cause an error in the white balance custom setup.
In this case, perform custom setup with a gamma other than [ITU709(800%)], [S-Log2], or [S-Log3]
first, and then reselect [ITU709(800%)], [S-Log2], or [S-Log3] gamma.
Setting [ITU709(800%)], [S-Log2] or [S-Log3] disables the [Black Level] setting.
If you set [Slope] to +5 in [Manual Set], [Knee] is set to [Off].
S-Gamut, S-Gamut3.Cine, and S-Gamut3 are color spaces exclusive to Sony. However, this
camera's S-Gamut setting does not support the whole S-Gamut color space; it is a setting to achieve
a color reproduction equivalent to S-Gamut.
[150] Recording movies
Gamma Disp. Assist
Movies with S-Log gamma are assumed to be processed after shooting in order to make use of
the wide dynamic range. They are therefore displayed in low contrast during shooting and may
be difficult to monitor, using [Gamma Disp. Assist], contrast equivalent to that of normal gamma
can be reproduced. In addition, [Gamma Disp. Assist] can also be applied when playing back
movies on the camera's monitor/viewfinder.
Menu item details
Off:
Does not apply [Gamma Disp. Assist].
Auto:
Displays movies with an [S-Log2
→709(800%)] effect when the gamma set in [Picture Profile] is
[S-Log2], and with an [S-Log3
→709(800%)] effect when the gamma is set to [S-Log3].
S-Log2
→709(800%):
MENU
→
(Setup)
→ [Gamma Disp. Assist].
1
Select the desired setting by pressing the multi-selector up/down. 2