100-400mm zoom lenses are some of the most popular out there, offering a versatile focal length range that can tackle a wide range of scenarios including everything from sports to wildlife photography and more. The Canon RF 100-400mm f/5.6-8 IS USM is one of the more affordable options among such lenses, though it still offers some impressive performance and features, and this excellent video review takes a look at just what you can expect from it in practice.