Is the sigma 60 600mm f 4 5 6 3 dg dn os sports good for portraits?

Not really. This is a telephoto zoom, and I wouldn't pick it for portraits. Its aperture is f/4.5 at 60mm and drops to f/6.3 by 600mm, which is slow for the soft backgrounds and fast autofocus that portraits depend on. At the long end, the compression that makes a 600mm lens great for wildlife is far too much for a face.

It's a better fit for wildlife and sport, where reach matters more than aperture. For portraits, start with the first lenses advice: a fast 50mm on full frame, or an 85mm for a more flattering look. You can see the full lens and its camera list on the Sigma 60-600mm DG DN OS Sports page.

Written by Claude from this site's pages.