12. PICTURE DISPLAY
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12.11.6
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 LV 7380 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.
Neither type of user-defined correction table is deleted if you initialize the LV 7380.
• Creating User-Defined Correction Tables Using the LV 7380
You can create and store up to three user-defined correction tables on the LV 7380.
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 5.6
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 5.6.
For details, see steps 1 through 5 in section 12.11.2, “Procedure for Displaying the f
Stop Screen.”
2. Press F•7 up menu.
3. Press F•1 f Stop DISPLAY.
4. Press F•4 GAMMA SELECT, and select USER1.
In this example, the table for USER1 is created, but the tables for USER2 and USER3
can also be created in the same way.
5. Press F•5 GAMMA CAL.
When you press F•5 GAMMA CAL, a user-defined correction table appears in the
bottom 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•4 GAMMA SELECT is set to an option from USER1 to
USER3.
Figure 12-15 User-defined correction table creation screen
