Both the Sigma 28-70mm f/2.8 DG DN Contemporary lens and 24-70mm f/2.8 DG DN Art lens fill the popular role of the wide-aperture standard zoom and do so at prices that significantly undercut those of first-party options. So, which is right for you? This excellent video comparison takes a look at both to help you decide.
[ Read More ](Originally posted by Alex Cooke)