It makes no sense to buy on a crop - an inconvenient focal length. The picture is nicer at full frame, but the AF50 f/1.4 is still better. On younger carcasses, by the way, autofocus will not work. True, the low price allows you to buy and try it yourself. In the end, fast glass in the economy will not be superfluous. Oh yes, another advantage - the lens does not need a hood, the front lens sits very deep.
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