I find it useful for crop, as the available focal lengths meet my requirements. There is a width for use while photographing indoors. This lens is typically positioned over the carcass. The sharpness is excellent, though not as well as the 70-200/4 IS. Although it could have been an issue in FF, I think the lens hood could have been improved by making it deeper. I just can't give this lens the same kind of glowing evaluation that others have given it; for me, it's just an average lens that will do the job without wowing me or letting me down. Many do feel a bit of euphoria after significant life changes such as turning 18-55, 18-85, or 18-135.
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