Day and Night compared to the same brand 35mm f1.4Art lens. This is the sharpest lens I have. I was afraid the lens wouldn't autofocus, but when I set it to 1.5-infinity autofocus I had no problem being able to follow birds and that I'm not that pro at telephoto lenses! A good buy without a doubt, thanks to Sigma for this work of art. Not to mention I chose the lens for its price and because it's almost on par with the Sony, half the price of the Sony GM variant, almost the same quality.
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