Tamron 20-40 mm f/2.8 Di III VXD
10. Autofocus and focus breathing
Autofocus
The autofocus of the Tamron 20-40 mm joined ith the Sony A7R III is completely noiseless. When it comes to its speed we don't have any reasons to complain either. At the shortest focal length everything is very quick and running through the whole distance range with confirming the focus takes typically 0.4-0.5 of a second. In case of the maximum focal length focusing takes a bit longer but in the majority of cases it fits the range of 0.5-0.7 of a second.When it comes to accuracy, we didn't experience any problems either. The lens performed properly well both outside and during our shooting session in the studio.
What's interesting, in case of the longest focal length we managed to notice a slight front focus tendency when we shot from closer distances.
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A7R III, 40 mm, f/2.8 |