[guyroch]

Originally Posted by Merlin66

Chris,
The USB connection is only good for 30 sec exposures.
I think I'm correct in saying the older (300/350D) cameras only work with PC running XP - doesn't work with win7/8.
http://hackaday.com/2006/09/19/canon...erial-control/

Yes, this is 100% correct.

The older models (DIGIC II) camera only works on Windows 32 bits system. If you have W7 or W8 32 bits you can installed the XP/Vista 32 bits drivers from Canon just fine.

However, the 300D is a DIGIC I camera and this will not work for computer assisted shooting.

An intervalometer remote is your only option.

Guylain