I use it on 5Dm3, there is an AF adjustment there, so you can adjust the autofocus correction for macro photography. But generally not critical. I suspect that specimens that always hit zero at f / 1.4 and a short distance or not, or they are worth their weight in gold. The depth of field is 1-2 mm. However. I wanted to change it to another one of the same kind and tested 4 different pieces, they all have a floating focus. You test, it hits zero. Then it moves away by a few mm, you introduce corrections, and again it hits zero. Then he leaves again. And so it goes back and forth. And such nonsense on all 4 lenses. And the store employees say that specific glass, how much it was tested, such garbage takes place on all samples. But since this is a landscape painter, in principle, this is not very critical, I will adapt it means. Maybe just a new one and will settle down over time, xs. But to Canon, the question is, how is it. Elka for 50 pieces and such an AF. I have a Sigma 85mm 1,4 in any conditions it beats perfectly and clearly to zero. And then . Well, one unsuccessful instance, but all 4 . Strange in general.
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