Is that supposed to be the IS??,or do you mean the L?.If it's just the ordinary f/4L at that price I'd start shopping somewhere else because at that price it's a friggin rip-off!
I have a Jessops converter which works perfectly and the AF is spot on,not everyone is made of money like you Darsey! :stinker:
due to the 30% increase in may on all canon and nikon gear thats what the price is on them but you can get the sigma one for cheaper and kay your kit lens will come in handy for stuff like when your walking the dogs and stuff like that imo you will always need atleast 2 lenses