Sony FE 14 mm f/1.8 GM
10. Autofocus
When it comes to the accuracy, overall we don't have any reservations. A high level of astigmatism of the tested lens is able to mess with the focusing mechanism a bit, though. How does it look in practice?
For example let's examine results we gathered with the help our biggest testing chart by f/2.8. In the case of JPEG files the highest value is 5135 LWPH but it was achieved by averaging out vertical and horizontal values, in this case amounting to 5844 and 4426 LWPH. Immediately afterwards the lens was able to reach an average result of 4993 LWPH so officially just a tad lower than te maximum. It wasn't a mistake – the problem was elsewhere. When we looked at components of that value they amounted to 3980 and 6006 LWPH. Not only the difference between them was even higher but also the components switched places. There were much more such strange cases.
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We didn't notice any distinct front or back focus tendencies.
| A7R III, f/1.8 |
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