Canon EOS-1D X Mark III DSLR Camera (Body Only) - Manual (Page 293)

Drop Frame
The time code's frame count will cause a discrepancy between the actual time and the time
code if the frame rate is set to
(119.9 fps), (59.94 fps), or (29.97 fps). The
discrepancy is corrected automatically when [ Enable ] is set. This correction function is
called “drop frame.”
Enable
Corrects the discrepancy automatically by skipping time code numbers (DF: drop
frame).
Disable
The discrepancy is not corrected (NDF: non-drop frame).
Time codes are displayed as follows.
• Enable (DF)
00:00:00. (Playback: 00:00:00.00)
• Disable (NDF)
00:00:00: (Playback: 00:00:00:00)
Note
Drop frame is not used for (100.0 fps), (50.00 fps), (25.00 fps),
(24.00 fps), or (23.98 fps) frame rates. (The [ Drop frame ] setting item is
not displayed when / / / / is set, or when [ : Video system ]
is set to [ For PAL ].)
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