Nikon D300 Complete Manual page 190

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Of these options, On makes the most sense, and is the one I

use on all my Nikon DSLRs. That's because file name

duplication is dangerous—you could accidentally erase or

overwrite a file you wanted to keep. If you set the camera to

Off, you'll generate a new

file every time you format the card and start shooting again.

I guess that I and others have been complaining about

Nikon's choices for file numbering long enough: the D300

sets On as the default, whereas almost all previous Nikon

DSLRs have had it set to Off.

A few photographers also rename the "DSC" portion of the

filename each time the camera "turns over" from 9999 to

to guarantee that they don't have duplicate filenames, but the

problem is that you need to watch carefully for the rollover

(hint: if you find that the card you just filled has a really high

number, such as

sequence menu and then increment the three-letter portion

using File naming on the SHOOTING menu when you insert

the next card).

Personally, I think this technique of renaming the filename on

rollover is risky behavior. It's just too easy to lose track of

what you're doing and if you mess up you could still get

duplicate filenames, which will be a major hassle and

potentially can cause data loss when you do.

To set the file numbering sequence, use Custom Setting #D6

(see "File Number Sequence" on page <553>).

Thom Hogan's Complete Guide to the Nikon D300

DSC_0001.JPG

, use Reset on the File number

). This allows them

Troubleshooting