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Title: Professional lens
Review: It use to be true that it matter little what camera you had. The most important was to have good lenses.It is different with digital but still partly true.I have just finished a big panorama landscape picture with great color difference between mountains and cloudy sky. One should see color aberration on contrast area like that but it is sharp even when I blow it up.I use this lens a lot. I have other good Canon lenses but most often I use that one.My camera is full frame. I used to have a camera with 1.6 crop factor. I used then wide angle lens more than I do now because all lenses are little wider on a full frame camera.
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