Zoom Bracketing 
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- Written for/on: Canon A640
- Also works on: Canon A590 tested , Other Canon AXXX
Zoom Bracketing by Johan Van Barel (http://www.vanbarel.com)
The purpose is to create a set of images taken at different zoom positions.
The script takes a number of images starting from the current zoom position. So if you take 3 pictures, with Zoom Step Size 1, the script will take the first picture at the current zoom position, the second at zoom position +1, and the third at zoom position +3 relative to the start zoom position. A positive Zoom Step Size will zoom in, a negative Zoom Step Size will zoom out. Afterwards the initial zoom position will be restored.
Documentation/Help (save as a small ZoomBracket.txt" file to your /CHDK/SCRIPTS/ folder)
Select any mode on your Canon A640 that allows zooming.
Parameters:
- Number of Pics (Default=2)
- Zoom Step Size(+/-) (Default=1)
- Initial Delay (Sec) (Default=1)
Script Code (save as "ZoomBracket.bas" to your /CHDK/SCRIPTS/ folder)
rem Johan Van Barel 07-07-2007
rem Zoom-Bracketing for Canon A640
@title Zoom Bracket
@param a Number of Pics
@default a 2
@param b Zoom Step Size(+/-)
@default b 1
@param c Initial Delay (Sec)
@default c 1
if a<2 then let a=2
if b=0 then let b=1
if c<0 then let c=0
print "Pics:"; a, "Step:"; b
get_zoom z
sleep c*1000
print "Pic 1 of", a
shoot
for s=2 to a
set_zoom_rel b
sleep 500
print "Pic", s, "of", a
shoot
next s
sleep 500
set_zoom z
end
