Canon EOS DIGITAL REBEL XTi, Руководство по обслуживанию

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Technical Information
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2）Noise reduction feature
As with the EOS 5D and EOS 30D, Custom Function C.Fn-02 [Long exp. noise reduction]
can be set to [Auto] or [On].
[1: Auto]
If the exposure time is 1 sec. or longer, detection of noise caused by the long exposure or
high air temperature (spots or red fringing at image corners) is performed. Noise reduction
is performed only if noise is detected.
[2: On]
Noise reduction is always performed for images shot with an exposure time of 1 sec.
or longer. This is effective for the noise that rarely occurs even in a low-temperature
environment (when such noise cannot be detected automatically).
＊ In the case of both the [Auto] and [On] settings, noise reduction will be performed as described above regardless
of the ISO speed setting.
＊ Shooting is not possible during the noise reduction process.
3）Image recording to CF card
⑴Writing to CF card
The same high-speed data writing as the EOS KISS DIGITAL N is attained.
⑵Folder and file numbering
As with the EOS 30D, one folder can now contain up to 9999 images. Also, the [File
numbering] menu now has the [Manual reset] option to manually reset the file numbering
and create a new folder. Thus, the images can be better organized. For example, pictures
taken today can be stored in a different folder from the folder containing pictures taken
yesterday. Note that the folder cannot be user-selected.