The Sigma 90mm F2.8 DG DN Contemporary is the latest in the company’s I series range of compact, mid-priced primes for mirrorless cameras. We’ve been shooting it on the Panasonic S5, to have a look at how it handles portraiture, among other subjects, as we made the most of what might be the last of Seattle’s autumn sunshine.

You can judge the impact on the bokeh shape of its nine rounded aperture blades, and see how it handles direct sunlight.