Canon EF-S 35 mm f/2.8 Macro IS STM review - Autofocus

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Canon EF-S 35 mm f/2.8 Macro IS STM

25 September 2017

Arkadiusz Olech

10. Autofocus

The Canon EF-S 35 mm f/2.8 Macro IS STM, according to its full name, features a new STM motor which makes the performance noiseless and very smooth. With the lens attached to the Canon 80D everything worked perfectly well. Running through the whole, very wide range, from the minimum focusing distance to infinity, took about 0.4-0.5 of a second. The other way round the mechanism was even quicker so it performed really beyond reproach.

In the case of the older Canon 50D the running times were similar but the lens wavered a bit, hunting for the right position. It happened especially when we passed from the minimum distance to an object situated in infinity; sometimes the autofocus got lost, moving in the wrong direction. Eventually it found the proper setting but the overall focusing time increased.

We don’t have the slightest reservations concerning the accuracy of the autofocus. The number of misses in studio reached a very low level of 2-3%. The lens also didn’t have any front or back focus tendencies.

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