Continuous Numbering; File Names - Canon EOS-1D Mark II Digial Instruction Manual

Continuous Numbering

The file numbering continues in sequence even after you replace the
memory card. This prevents images from having the same file number,
so image management with a personal computer is easier.
File numbering after
changing the folder
100
XXXX0001
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Even if the memory card still has space, shooting is not possible beyond
file number 9999. If this happens, follow the instructions on the LCD
monitor and hold down the <
select [OK]. A new folder will be created and you can continue shooting.
To prevent any interruption in shooting, set the file numbering method to
[M-Reset] beforehand.
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If the memory card in use has a DCIM folder, the file numbering might
continue from the last image saved in the folder.

File names

A file name is assigned automatically to each
image you capture. The file name consists of a
unique, four-character camera code preset at
the factory and a file number assigned
automatically. The camera code cannot be
changed.
Forced reset (M-Reset)
This creates a new folder automatically and starts the file numbering
from XXXX0001. Subsequent images you capture are stored in this
new folder. The file numbering method (auto reset or continuous
numbering) will be the one that was set before forced reset.
64
Memory card 1
101
XXXX0002
File numbering after replacing
the memory card
Memory card 1
XXXX0001
X
> button and turn the <
Memory card 2
XXXX0002
5
> dial to
(Example)
5F9Z0001.jpg