Selecting The Gamma; Using The Standard Gamma; Using The Hyper Gamma; Using The User Gamma - Sony F23 Operation Manual

3-11 Selecting the
Gamma
You can use User gamma you create in addition to the
built-in Standard gamma and Hyper gamma.
Use the <GAMMA> page of the USER (PAINT) menu for
gamma operations.
<GAMMA> page
< G A M M A >
[ R ] [ G ] [ B ] [ M ]
L E V E L : 0
C O A R S E : 0 . 4 5
B
T A B L E : S T A N D A R D
: 5 ( I T U - R 7 0 9 )
G A M M A : O N
T E S T :

3-11-1 Using the Standard Gamma

The standard gamma is intended to be used for on-the-spot
creation of video materials, eliminating the need for post-
production processing.
When STANDARD is selected on the first line of TABLE
of the <GAMMA> page, you can select from among the
following standard gamma curves:
Gamma table No. Gamma curve
1 equivalent to SD ENG camcorder
2 equivalent to 4.5-times gain
3 equivalent to 3.5-times gain
4 equivalent to SMPTE-240M
5 equivalent to ITU-R709
6 equivalent to 5.0-times gain
It is recommended to use the No. 5 (ITU-R709) curve in
normal use.
As ITU-R709 provides 4.5-times gain around the black,
select the No. 6 (×5) curve when better tonal reproduction
is required.

3-11-2 Using the Hyper Gamma

The Hyper Gamma is a set of transfer functions designed
to be easy to use as previous gamma curve functions and to
realize a natural tone in high contrast scenes by taking full
advantage of the capacity and wide dynamic range of the
CCD sensor.
U 1 9
0 0 0
O F F
1
Select HYPER on the first line of TABLE on the
<GAMMA> page, and select the hyper gamma table
most suitable to the shooting conditions and purpose.
Effective for shooting
in low-light scenes
for better tonal
reproduction of low-
key areas (assuming
that –3 dB gain is
used)
Clipping Hyper Gamma 1
the upper
limit to
around
100%
Clipping Hyper Gamma 3
the upper
limit to
around
109%
Hyper Gamma 3
109%
100%
Hyper Gamma 1
These curves are equivalent to those built into the HDW-F900R HD
Camcorder.
2
Call the <WHITE CLIP> page of the PAINT menu and
adjust the white clip level to fit the selected hyper
gamma.

3-11-3 Using the User Gamma

User gamma curves are initialized with S-LOG at the
factory.
S-LOG is a set of data optimized to record image
information as digital data materials by using the entire
dynamic range of this camera. It assumes digital
processing in post production.
You can also create a desired gamma table, using a
personal computer on which software CvpFileEditor™
has been installed and load the table into the camera via a
"Memory Stick."
When a user gamma table is selected, control of gamma
(LEVEL or ON/OFF) may become disabled, depending on
Effective for shooting
from low-light to
high-contrast scenes
(assuming that 0 dB
gain is used))
Hyper Gamma 2
Hyper Gamma 4
Hyper Gamma 4
Hyper Gamma 2
1)
47

Selecting the Gamma