70-200mm f/2.8 lenses are highly popular workhorses, suitable for a huge range of genres and applications. That being said, they are both expensive and rather bulky. If you do not need that extra aperture to stop, but still want the versatility of that focal length range, a 70-200mm f/4 can save you both bulk and money. This excellent video review takes a look at Sony's option, the FE 70-200mm f/4 G OSS.