The Sigma 60-600mm f4.5-6.3 DG OS HSM Sports is a lens lots of photographers will find super useful.

Wildlife photographers are really the ones who are going to love the Sigma 60-600mm f4.5-6.3 DG OS HSM Sports. In truth, very little is as great as getting some of that fantastic morning light in a shot with gorgeous wildlife. This lens is built for exactly that. Not only does it autofocus quickly, but it’s built solidly. And while there is nothing wrong with this lens, I wonder why it was made for DSLRs. In fact, I find it almost to be a waste. Mirrorless cameras are just so much more capable and that would have easily extended the capabilities of this lens.
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https://www.thephoblographer.com/2020/01/27/review-sigma-60-600mm-f4-5-6-3-dg-os-hsm-sports/