All jambs can be experienced, except for back focus. Because of this, you can only use contrast AF via live-view or manual, which, of course, is unacceptable. Therefore, I did not take it in China, but overpaid a little for the opportunity to return it, which I did the next day. Judging by the presence of positive reviews on the Internet, the workmanship is pure lottery. You also need to consider that the options for Nikon and Canon are somewhat different in design, so it is possible that the Canon version will have its own problems.
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