Is the canon rf s 55 210mm f 5 7 1 is stm good for sports?

It can work for sports, but only in good light. This is a budget telephoto zoom, and at f/5-7.1 it gets darker as you zoom in. On an APS-C body like the Canon EOS R7, it frames like 88-336mm on full frame, which gives you the reach that wildlife and sport demands. Outdoors on a bright afternoon, that's a useful kit. Indoor games or dusk will push your shutter speed and ISO hard, and fast-moving action needs both.

Image stabilisation helps with handheld shots, but it won't freeze a fast player. If sport is your main subject, look for a faster telephoto. Buying used is a cheap way to try longer lenses without losing much money.

Written by Claude from this site's pages.