I walked around this glass for a long time, trying wherever I could. Finally took it off. I sold it a couple of weeks later and I don't want to hear about it anymore. If he had a price in the region of 15,000, somehow it was possible to justify his result. But at the current price does not justify its purchase. The center is very good, even in the open. But along the edge of the frame, none of the apertures provides sharpness comparable to sharpness in the center. Extremely strange working af. What's on the old firmware, what's on the new one. For those who wish to buy it, I recommend paying increased attention to edge sharpness. And most importantly: do not trust any tests, trust only independent tests and your eyes.
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