Canon 70-200 F4 vs Sigma 70-200 F2.8?

[mrbez]

Hi Guys,

As per the title, which of the two lenses would you choose if you had the option?

Has anybody owned both and can offer some advice?

Thanks,

Craig.

 

[stupar]

Already discussed in this thread http://www.talkphotography.co.uk/forums/showthread.php?t=267042&highlight=canon+70-200+sigma+F2.8