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Lens review

2009-08-25
 

Sony Carl Zeiss Vario-Sonnar T* DT 16-80 mm f/3.5-4.5

6. Distortion

Distortion is another aberration difficult to avoid in wideangle lenses starting with wide focal length range. It is known that sometimes the producers can’t manage it, it’s enough to remind the slip-up of Canon 17-85 mm which, at 17 mm had as much as –6% .

Zeiss fares much better - at the widest angle, the distortion is –3.9% barrel. It’s still a lot and the result is the same as in the cheaper Sigma 17-70 mm, although Sigma had it easier because of the narrower focal length range.

Fortunately when the focal length rises we get rid of distortion almost completely. At 30 mm it’s almost zero (0.16%) within measurement errors accuracy; at 50 and 80 mm it increases a bit but it keeps the same 0.64% level.

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Sony Carl Zeiss Vario-Sonnar T* DT 16-80 mm f/3.5-4.5 - Distortion

Sony Carl Zeiss Vario-Sonnar T* DT 16-80 mm f/3.5-4.5 - Distortion

Sony Carl Zeiss Vario-Sonnar T* DT 16-80 mm f/3.5-4.5 - Distortion

Sony Carl Zeiss Vario-Sonnar T* DT 16-80 mm f/3.5-4.5 - Distortion

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