Canon CHDK User Manual page 13

Bracketing in continuous mode
Bracketing is the practice of making several exposures of a scene,
with each exposure differing from the next by predetermined steps
in exposure or focus settings. Bracketing is used to easily capture
a range of exposures so that the best exposure can be selected at a
later time. Bracketing is also used to create a series of exposures
which will be combined using methods such as HDR processing.
The bracketing features are enabled when the camera drive mode
is set to continuous, and custom timer with some models.
• TV bracketing value
Set this value to bracket via exposure time. A value of 1 will
double or halve the exposure time for the following exposures.
• AV bracketing value
Set this value to bracket via aperture. A value of 1 will open or
close the aperture by 1 stop for the following exposures.
• Subj. Dist. Bracket Value
Set this value to enable focus bracketing. This feature is only
enabled during manual focus mode on some versions. It allows you to specify the manual focus
distance in millimeters. This value is multiplied by the Value factor below to arrive at the final
value.
Usage Tip: If you wish to fire off individual frames and still have
bracketing for each one, after the first shot lightly let-up on the
shutter button to a half- press position. The next full-press will
give you another bracketed shot. This process can be repeated
for as many bracketing steps as you need. Giving you finer
control over the number of bracketed exposures you may require.
Set camera Custom Timer in Canon Menu
[Off, 1/3 – 4 Ev]
[Off, 1/3 – 4 Ev]
<
Extra Photo Operations < Main Menu
See: Bracketing notes:
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