My copy is a front focus master. That is, he always focused in front of the subject. I have a 7D and I adjusted it manually (according to the photo target), now everything is fine. The lens began to give a sharp picture even at f / 1.8. The color rendition of the lens is 3 out of 5. Very fast - and this is a class! To use it with a protective hood is to catch hares . And why, the lens is cheap .
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