Sigma 150 mm f/2.8 APO EX DG OS HSM Macro review - Autofocus

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Sigma 150 mm f/2.8 APO EX DG OS HSM Macro

24 August 2011

Arkadiusz Olech

10. Autofocus

The Sigma 150 mm OS Macro is equipped with an ultrasonic autofocus motor. Its presence guarantees silent work but, unfortunately, not good speed. In the FULL mode running through the whole scale takes even two seconds. Using the focus limiter we can shorter that time by half but even then the result is nothing to be proud of.

In the case of this lens’s predecessors we complained a bit about the accuracy of the focusing mechanism. The new Sigma 150 mm f/2.8 Macro improved its performance there because the number of misses in studio conditions reached 6%. It is hardly an excellent result but it would be difficult to complain about it either.

There were no problems concerning front or back focus tendencies. The tested Sigma, attached to the D3x and to the D200 always hit the right spot without the necessity of using the microregulation here.

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