I have recently bought a cheap (relative to Canon cost) Chinese intervalometer from DPD in North Sydney.
I needed mine quite quickly so it was easy for me to pop round the corner & pick it up, suspect the same things are cheaper on eBay if you're not time critical.
http://www.d-d-photographics.com.au/...%252d80N3.html
It's clearly a copy of the canon one, but les s than half the price.
Easy to use too. It will keep taking shots until the memory card is full unless you tell it how many to take.
Hth
J
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