LensTip.com

Lens review

Sigma 50 mm f/1.4 EX DG HSM

16 June 2009
Arkadiusz Olech

10. Autofocus



Please Support Us

If you enjoy our reviews and articles, and you want us to continue our work please, support our website by donating through PayPal. The funds are going to be used for paying our editorial team, renting servers, and equipping our testing studio; only that way we will be able to continue providing you interesting content for free.

- - - - - - - - - - - - - - - - - advertisement - - - - - - - - - - - - - - - - -

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

This category happens to be a Sigma’s Achilles heel. Even lenses equipped with an USM motor, especially while working on a Canon, give unsatisfying effects. The biggest was our pleasure when we found out that the Sigma 1.4/50 HSM is difficult to fault here. The autofocus motor works very quietly and quickly, going through the whole scale in about 0.5 second. The error number was moderate – 8% in the studio conditions. It can certainly increase in worse conditions.

The tested specimen had a slight frontfocus tendency but it appeared only if wide open, becoming practically imperceptible by f/2.0


Sigma 50 mm f/1.4 EX DG HSM - Autofocus