Lens review
2007-09-27
Sigma 100-300 mm f/4 DG EX APO IF HSM
10. Autofocus
The Sigma 100-300 mm is equipped with a High Speed Motor (HSM), which makes its autofocus performance fast and quiet. Unfortunately, this particular model that we tested had a small flaw that is common with other Sigma lenses (especially when working with a Canon body: front focusing.
