Your Camera Stops Counting at 9,999 Because of a 1998 Filing Standard Written Around MS-DOS
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Summary
Shoot past frame 9,999, and the camera does not run out of numbers. It closes the folder it has been writing to, opens the next one, and starts again at 0001, which is how two shoots two years apart both end up holding a file called IMG_0473.CR2. The 0001 to 9999 numbering space, the DCIM folder those files live in, and the four-letters-plus-four-digits name itself all come from one short specification a Japanese trade group published in 1998. The rollover is the manufacturer's own choice, made inside the room that specification built. [ Read More ]
Found in: Fstoppers. Rating basis: single outlet; outlet tier 2 (unlisted); 1 feeds; feed position 1.