At long distances, the sharpness still decreases, only to "squeeze", so f4 is rather formal. Zess does not justify the brand, the price-quality ratio is below the plinth, for a price above 60k it should be a "razor". Pros below: Good quality case. Smooth zoom. Good focus speed. Compact. Light. Quiet. Color rendition is good. Has cons: They write that it is sharp, but it depends on what to compare with. Objectively speaking, for its price, the sharpness is mediocre, of course, sharper than the whale Sony 16-50, but even the Deshman nikon 18-55 af-p is much sharper. Sony generally has trouble with crop lenses in terms of sharpness.
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