Sigma C 90 mm f/2.8 DG DN
10. Autofocus
After attaching the lens to an older body, the Sony A7R III, we didn't notice any significant change – once again the performance was noiseless and quick. We think it was even a tad quicker in fact – the times, registered by us, more often than not kept the range from 0.4 to 0.5 of a second.
The accuracy of the autofocus can't be called outstanding. The percentage of misses for both bodies was the same, amounting to about 5-6%, a higher value than in case of system lenses used with the same camera bodies.
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We didn't notice any distinct front or back focus tendency.
| A7R III, f/2.8 |
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