Canon EOS 50D - Manual (Page 184)

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3 Custom Function SettingsN
C.Fn IV -6 Add original decision data
0: Off
1: On
Data for verifying whether the image is original or not is appended to the
image automatically. When the shooting information of an image
appended with the verification data is displayed (p.133), the <L> icon
will appear.
To verify whether the image is original, the Original Data Security Kit
OSK-E3 (sold separately) is required.
C.Fn IV -7 Assign FUNC. button
You can change the menu displayed when the <B> button is pressed.
0: LCD brightness
The [6 LCD brightness] menu will appear.
1: Image quality
The [1 Quality] menu will appear.
2: Exposure comp/AEB setting
The [2 Expo. comp./AEB] menu will appear.
3: Image jump w/6
The [4 Image jump w/6] menu will appear.
4: Live View function settings
The [6 Live View function settings] menu will appear.
The images are not compatible with the image encryption/decryption
features of Original Data Security Kit OSK-E3.
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