LensTip.com

Lens review

Tamron 20 mm f/2.8 Di III OSD M 1:2

27 March 2020
Maciej Latałło

6. Distortion



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Distortion correction performed by the Tamron 20 mm f/2.8 Di III OSD M 1:2 is a kind of a joke. Already on the smaller APS-C sensor barrel variations of that aberration are very distinct and their level we assessed as −4.24%. It is such a high value that it would make us worry even if it concerned full frame.

Meanwhile the performance on the bigger detector is simply a disaster – how else can be described a value of −8.29% we measured during the test? I honestly can't remind myself another prime with such a dramatically bad result in this category.

Sony A7R II, 20 mm, APS-C
Tamron 20 mm f/2.8 Di III OSD M 1:2 - Distortion
Sony A7R II, 20 mm, FF
Tamron 20 mm f/2.8 Di III OSD M 1:2 - Distortion