Intervalometer Take a set of images at a given interval in minutes and seconds.

Introduction

The purpose is to create a set of images taken at a given interval in minutes and seconds.
It can be useful for photography of slow moving or changing objects like trees, plants, flowers, planets, weather etc. Later, the images can be used to create a sequence in the form of a movie. For long intervals you should disable the Power Saving options of your camera. This can be done in the <ALT> menu. In the Miscellaneous Stuff menu item set the Disable LCD Off value to Script, so the display won't turn off while in <ALT> mode or while a script is running.

Written for: Canon A640
Also works on: Other Canon AXXX (Not tested), Canon A590 tested


Parameters (Save as "Interval.txt" file to your /CHDK/SCRIPTS/ folder)

Select any mode on your Canon A640.

  • Number of Pics (Default=2)
  • Interval (Min) (Default=0)
  • Interval (Sec) (Default=10)
  • Initial Delay (Sec) (Default=1)

Script Code (save as "Interval.bas" to your /CHDK/SCRIPTS/ folder)

rem Johan Van Barel 07-07-2007
rem Interval for Canon A640

@title Interval
@param a Number of Pics
@default a 2
@param b Interval (Min)
@default b 0
@param c Interval (Sec)
@default c 10
@param d Initial Delay (Sec)
@default d 1

if a<2 then let a=2
if b<0 then let b=0
if c<0 then let c=0
if d<0 then let d=0
t=b*60000+c*1000

print "Pics:"; a
print "Total Time:", t*(a-1)/60000; "Min",
	t*(a-1)%60000/1000; "Sec"

sleep d*1000

print "Pic 1 of", a
shoot
for s=2 to a
    print "Wait",b;"Min",c;"Sec"
    sleep t
    print "Pic", s, "of", a
    shoot
next s

end

Download and Installation

This script is freeware. Before you can install it, you need to download and install the CHDK Firmware Extension for your specific Canon camera. CHDK is freeware and can be downloaded for a broad range of Canon PowerShot and Digital Ixus cameras here. If you own a Canon A640, you can download a specific build here, which already contains all the CHDK scripts from this site, including the one mentioned above. Copy all the files in this archive to the root of your SD card. If you have problems installing CHDK, please refer to the CHDK Wiki Pages.


Disclaimer

This software and the accompanying files are supplied "as is", without any express or implied warranty. In no event shall the author be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages from the use of this software. By using this software you agree with these conditions.

Copyright © 2007 by Johan Van Barel. All Rights Reserved