This company advertised a product lower than other sites. Required a call back after submitting purchase. I was told that the lens "has a plastic fitting and will not permit auto-focus with Canon EOS cameras. I should get the $100 more expensive Sigma lens. It isn't listed on the Sigma website, because we are exclusive wholesalers for Sigma, and this lens has yet to be officially released in the US." I called back after first agreeing to this, because it seemed to me that the lens being sold is a $200 retail lens. He reiterated... read full review »