Sigma 17-70mm F2.8-4 Contemporary

Bokeh

A lens with good bokeh is capable of producing smooth and pleasing out-of-focus backgrounds.  Because bokeh is a highly-subjective matter, we will leave it mostly up to you to decide whether or not you like the bokeh that this particular 17-70mm lens produces.

We tend to like the bokeh, as it is smooth and in no way distracting, thanks to the lens's circular 7-bladed aperture.  Zooms often tend to have trouble producing good bokeh, but that's certainly not the case with this lens!

Sigma 17-70mm Bokeh SampleClose-Up Bokeh Sample (Click to enlarge)

Refer to the test photos below to see how the bokeh changes as you stop down.  Click on any photo to open a scrollable lightbox.

Stopped
Down
17mm
70mm
Wide-open
1 stop
2 stops
3 stops
4 stops
5 stops

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