Canon EOS-1D Mark IV - Manual (Page 234)

Custom Function Settings
C.Fn IV -15 Add aspect ratio information
During Live View and movie shooting, verticai lines corresponding to the
aspect ratio will be displayed. You can thereby simulate still photo framing
for medium- and large-format film sizes such as 6x6 cm, 6x4.5 cm, and 4x5
in.
This aspect ratio information will be appended automatically to the captured
image. (The image will not be saved to the card as a cropped image.)
When the image is transferred to a personal computer and Digital Photo
Professional (provided software) is used, the image will be displayed in the
aspect ratio you specified.
0: Off 4: Aspect ratio 6:7
1 : Aspect ratio 6:6 5: Aspect ratio 10:12
2: Aspect ratio 3:4 6: Aspect ratio 5:7
3: Aspect ratio 4:5
s
Aspect ratio information will also be appended during viewfinder
shooting.
During image playback on the camera, vertical lines for the respective
ratio will be displayed.
C.Fn IV -16 Add image verification data
0: Disable
1: Enable
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.157), the <fl> icon
will appear.
To verify whether the image is original, the Original Data Security Kit
OSK-E3 (sold separately) is required.
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