I bought mine for my nikon from bhphoto.com but they also have ones for canon. That's the only place online (trusted) I could find it. All others have f/4.
Of the out of stock sellers (which is most of them) amazon.com is actually the cheapest at $590. Don't know why they are 50 dollars cheaper than everyone else but they are.
I got mine at http://www.adorama.com/, they were out of stock last summer (as they are now), but I placed an order to hold one before they came in. It shipped once they got them in stock. They don't charge your credit card until it ships - so it is low risk. I'd place an order at a place that allows you to do it (such as Adorama.com) and wait. Don't get too impatient you may end up doing something you might regret in the future. Keep in mind sometimes ordering outside the US can void any warranty in the US.
------------- --Kevin
http://www.webvisiontours.com/
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