Lens review
2010-05-15
Tokina AT-X 840 AF D 80-400 mm f/4.5-5.6
10. Autofocus
Having in mind torments the Sigma’s 70-300 mm APO autofocus inflicted on its users the performance of the Tokina’s 80-400 mm focusing mechanism deserves our praise. We must honestly admit, though, that it still lags behind the best ultrasonic motor lenses.
During focusing we hear slight but not very bothersome whirr. The speed of the mechanism is better than that of the Sigma 70-300 mm APO, comparable with the Canon’s 70-300 IS and distinctly worse than the Nikkor’s 70-300 VR.
When it comes to accuracy we didn’t notice any front or back focus tendency. Apart from that in studio conditions the autofocus missed on average in 6% of cases – it is deemed to be a good result.
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