Sony F23 Product Manual (F23 Operation Manual 1st edition) - Page 47

Selecting the Gamma, 3-11-1 Using the Standard Gamma - camcorder

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Chapter 3 Basic Adjustments and Settings 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 page of the USER (PAINT) menu for gamma operations. page U19 LEVEL [R] [G] [B] [M] :0 0 0 0 COARSE : 0.45 TABLE :BSTANDARD : 5 (ITU-R709) GAMMA : ON TEST : OFF 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 postproduction processing. When STANDARD is selected on the first line of TABLE of the 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. 1 Select HYPER on the first line of TABLE on the page, and select the hyper gamma table most suitable to the shooting conditions and purpose. Clipping the upper limit to around 100% Clipping the upper limit to around 109% Effective for shooting Effective for shooting in low-light scenes from low-light to for better tonal high-contrast scenes reproduction of low- (assuming that 0 dB key areas (assuming gain is used)) that -3 dB gain is used) Hyper Gamma 1 Hyper Gamma 2 Hyper Gamma 3 Hyper Gamma 4 109% 100% Hyper Gamma 3 Hyper Gamma 4 Hyper Gamma 2 Hyper Gamma 1 These curves are equivalent to those built into the HDW-F900R HD Camcorder. 2 Call the 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™1) 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 47 Selecting the Gamma

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47
Selecting the Gamma
Chapter 3
Basic Adjustments and Settings
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
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:
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.
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.
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™
1)
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
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
<GAMMA>
U19
[R] [G] [B] [M]
LEVEL
: 0
0
0
0
COARSE
: 0.45
TABLE
:
B
STANDARD
: 5 (ITU-R709)
GAMMA
: ON
TEST
:
OFF
Effective for shooting
in low-light scenes
for better tonal
reproduction of low-
key areas (assuming
that –3 dB gain is
used)
Effective for shooting
from low-light to
high-contrast scenes
(assuming that 0 dB
gain is used))
Clipping
the upper
limit to
around
100%
Hyper Gamma 1
Hyper Gamma 2
Clipping
the upper
limit to
around
109%
Hyper Gamma 3
Hyper Gamma 4
109%
100%
Hyper Gamma 3
Hyper Gamma 4
Hyper Gamma 1
Hyper Gamma 2