24-70mm f/2.8 lenses are the workhorses of many genres in the industry, combining a useful focal length range with a nice maximum aperture for a zoom lens. If you do not need that f/2.8 aperture, though, f/4 versions offer the same versatility in a smaller package and at a much lower cost. The Sony FE 20-70mm f/4 G embodies that and offers an even more versatile focal length range, making it quite desirable for a huge range of applications. This excellent video review takes a look at the lens and the sort of image quality and performance you can expect from it in usage.