Sigma AF 105mm f/2.8 EX HSM DG OS macro (Canon EOS) - Full Format Review - Sample Images & Verdict
Lens Reviews - Canon EOS (Full Format)

Sample Images

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Make Canon
Model Canon EOS 5D Mark II
ISO Speed 200
Focal Length 105.0mm
Aperture: f/2.8
Exposure 1/160s
Make Canon
Model Canon EOS 5D Mark II
ISO Speed 200
Focal Length 105.0mm
Aperture: f/2.8
Exposure 1/200s
Make Canon
Model Canon EOS 5D Mark II
ISO Speed 200
Focal Length 105.0mm
Aperture: f/2.8
Exposure 1/320s
Make Canon
Model Canon EOS 5D Mark II
ISO Speed 200
Focal Length 105.0mm
Aperture: f/2.8
Exposure 1/1000s
Make Canon
Model Canon EOS 5D Mark II
ISO Speed 200
Focal Length 105.0mm
Aperture: f/2.8
Exposure 1/4000s
Make Canon
Model Canon EOS 5D Mark II
ISO Speed 200
Focal Length 105.0mm
Aperture: f/2.8
Exposure 1/4000s
Make Canon
Model Canon EOS 5D Mark II
ISO Speed 200
Focal Length 105.0mm
Aperture: f/5.6
Exposure 1/320s
Make Canon
Model Canon EOS 5D Mark II
ISO Speed 200
Focal Length 105.0mm
Aperture: f/5.6
Exposure 1/800s

Verdict

The Sigma AF 105mm f/2.8 EX DG HSM OS macro is an impressive lens. The resolution is generally very high although the border quality could be a little better at large aperture settings. Typical for macro lenses distortions are a non-issue. Vignetting is only a real problem at f/2.8. The quality of the bokeh (out-of-focus blur) is excellent except for the rather pronounced "cat's eyes" at the border of the image field. On the up side, bokeh fringing is comparatively well controlled. Lateral CAs are a very low and nothing to worry about.

The build quality of the Sigma lens is on a very high level. Similar to its Canon counterparts it keeps a constant physical length during focusing. This design is possible by incorporating an inner focusing system which is, in combination with an ultrasonic (HSM) motor, also responsible for the very high AF speed of the lens. Sigma's image stabilizer (OS = optical stabilizer) is, of course, a very welcome addition. It is pretty efficient at standard focus distances although you shouldn't expect wonders from it in macro scenes due to the much more pronounced angular shake here.

The Sigma lens has only few issues and it is slightly superior to the Canon EF 100mm f/2.8 USM L IS - at lower costs. It is certainly a lens that should be seriously considered if you are shopping in this lens class.

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Mechanical Quality:
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