The safest lens focus position is + infinity when the lens block is fully inside. Its pros: An excellent picture, at 1.4 it is soft (but beautiful), from 2 - the clarity is excellent, from 2.5 it simply rests on the resolution of the matrix (at 20D). The focus is quiet and fairly accurate, the speed is also nothing. With its cons. Flimsy. I rode with a camera on a snowboard in the mountains and as a result, a blow fell on the extended lens block (mitigated by a backpack, but still). After that, the focus gets stuck in positions closer than 80 cm, it needs to be helped with hands. I understand that I have been lucky. The repair price is half the price of the lens (and the price mainly consists of very expensive components, which I even found in the price lists of suppliers).
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