Wide angle zoom lenses with an aperture of f/2.8 are often considered the standard for professionals, but there are many genres for which that wide aperture is not really needed, and photographers can take advantage of lighter, more affordable, and more capable lenses if they are willing to use an f/4 lens. One such lens is the Canon RF 14-35mm f/4L IS USM, and this great video review takes a look at the kind of performance and image quality you can expect from it in practice.