Immediately after the purchase, there was no sharpness as such at all. I confess - I did not check in the store. Then began a long struggle for alignment. The St. Petersburg service center did not want to adjust. Just. Handed over twice, called, wrote, swore - did not help. In Hong Kong, as far as I understand, they did the maximum that can be pulled out of this lens. Well, what can I say - there is no ringing, but I'm not nervous anymore. ;) P. S. in two years. I suffered with this piece of iron. I handed it over for repair several times, as a result, the service center wrote "completely faulty." There is very little time left until the end of the warranty. I handed over to the store on Hong Kongskaya. They tried to slip a few obviously unusable lenses, and slipped the same implicitly faulty one. After a short time, my path was back to the service center. Verdict: dead. I handed it over to the store at the current price of 37 tons. But I took it for 21 tons. This was such compensation for me. ;-)
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