Fujifilm Fujinon XF 18 mm f/2 R review - Autofocus

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Fujifilm Fujinon XF 18 mm f/2 R

14 September 2012

Arkadiusz Olech

10. Autofocus

The tested lens plus the Fujifilm X-Pro1 set are equipped with a contrast detection autofocus. You have to go beyond the right autofocus position and then return to it. Despite that the autofocus works very swiftly and the focusing process doesn’t last longer than 0.5 of a second. Still it is hardly noiseless because during its work you can hear a slight but audible whirr.

The focusing system is not a strong point of the X-Pro1. Fortunately a large depth of field provided by a 2/18 lens helps us here so smaller mistakes of the autofocus are forgivable. Even if you take it into account the number of misses, with the MTF over 20% worse than the best result reached at a given aperture, went to a significant level of 11%. Definitely nothing to be proud of.

The photo below was made from the minimum focus distance. It shows a slightly uneven spread of the depth of field, suggesting a bit of back focus. Even in that most difficult situation the proper object fits the depth of field so the back focus won’t be bothersome.

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