Canon EOS 20D Service Manual page 80

Technical Information
(3) White balance bracketing (WB-BKT)
As with the EOS 10D, a single shot results in three bracketed images each
having a different white balance. You can bracket up to ±3 levels in 1-level
increments. The bracketing direction is the same as with white balance
correction. It can be parallel to the blackbody radial locus in the
blue/Standard color temperature/amber direction or intersecting with the
blackbody radial locus in the magenta/standard color temperature/green
direction.
6) Noise reduction
With the EOS 10D, fixed-pattern noise was minimal in long exposures so there
was no noise-reduction feature. But if the exposure was extremely long, noise
spots and a red tinge at the image corners occurred. With the EOS 20D, such
fixed-pattern noise is further reduced by the noise reduction feature (C.Fn-02)
so that the image has less noise.
The noise reduction feature starts working when the exposure is 1 sec. or
longer. The noise-reduction processing takes the same amount of time as the
exposure time. You cannot take another picture until after the noise-reduction
processing is completed.
7) Image recording to CF card
(1) Writing to CF card
Thanks to DIGIC II and an improved card-writing process, the data-writing
speed is approx. 3.5 times
* With a Canon 512 MB (Super High-speed) CF card
(2) Folder No. and file No.
The idea behind the automatically-
generated folder No. and the file No.
assigned to the captured image is the
same as the EOS 10D's. The file name
extension is as shown in Table 20.
Regarding RAW+JPEG images, they are
saved under the same file No. in the same
folder, as with the EOS-1D. The file name
starts with "IMG_" for both JPEG and RAW images.
8) Startup time
The startup time has been shortened to approx. 0.2
camera's microcomputer serving as the master (direct switch detection by the
MPU), DIGIC II, an improved system process sequence during startup, a
revamped CF card access method, and shorter startup processing.
* EOS 10D startup time was approx. 2.2 sec.
Note: When Power Switch is set from Off to On, and startup is completed as SW-1 is On (ready to
shoot).
faster* than with the EOS 10D.
Recording
Quality
JPEG
RAW
8
Table 004 File name and extension
Color space File name
sRGB IMG_
Adobe RGB _MG_
sRGB IMG_
Adobe RGB _MG_
sec.* thanks to the
extension
.JPG
.CR2