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!
Close-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.
StoppedDown | 17mm | 70mm |
Wide-open | ||
1 stop | ||
2 stops | ||
3 stops | ||
4 stops | ||
5 stops |