13. Picture Screen
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13.6.7 Configuring User-Defined Correction Tables
The default gamma correction value when measuring f Stop levels is 0.45, but you can also
use a user-defined gamma correction table that matches the gamma characteristics of the
camera that you are using.
There are two types of user-defined correction tables. The first type consists of tables that
are created using the instrument and is made up of the USER1 to USER3 tables. The second
type consists of tables that have been created externally using a device such as a PC and is
made up of the USER_A to USER_E tables. These tables are not deleted even if you initialize
the instrument.
• Creating User-Defined Correction Tables Using the instrument
You can create and store up to three user-defined correction tables.
As an example, the following procedure shows how to create a user-defined correction table
that matches a camera's gamma characteristics.
Set the camera's f Stop value to F5.6 beforehand, and put an 18 % gray chart in the area
that you will film.
1. Adjust the lighting so that the displayed luminance level of the 18 % gray chart is
45.0 % (for example) on a camera whose f Stop value is set to F5.6.
For details, see section 13.6.3, “%DISPLAY Screen Description.”
2. Press F•7 up menu.
3. Press F•1 CINELITE DISPLAY to select f Stop.
4. Press F•2 f STOP SETUP.
5. Press F•5 GAMMA and then F•1 GAMMA SELECT to select USER1.
In this example, explanation will be given for USER1, but USER2 and USER3 can also be
created in the same way.
6. Press F•2 GAMMA CAL.
A user-defined correction table appears in the lower left of the screen, and the
luminance level appears as a 10-bit value (0% is displayed as 64, and 100% is displayed
as 940) close to the cursor.
This setting is available when F•1 GAMMA SELECT is set to an option from USER1 to
USER3.
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