LensTip.com

Lens review

Sigma C 45 mm f/2.8 DG DN

28 February 2020
Maciej Latałło

10. Autofocus

Autofokus of the tested lens, cooperating with the Sony A7R II camera, is completely noiseless – you don't even hear whirr of moving elements. Still the speed can only be called moderate because running through the whole distance range and confirming the focus takes from 0.5 to 0.7 of a second.

We have some reservations concerning accuracy. While shooting both in the studio and outside we noticed some misses and their percentage reached 5-6%. It's a bit too high for mirrorless standards.

The lens didn't have any front or back focus tendencies for a change. When we took photos from a very close distance we could notice a slight shift of depth of field toward the shorter distances but the object of the photo still remained sharp. That effect could be also caused by curvature of field, not only front-focus.


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A7R II, f/2.8
Sigma C 45 mm f/2.8 DG DN - Autofocus