24-70mm f/2.8 lenses are the workhorses of choice for a lot of photographers and filmmakers, as they cover a range of the most commonly needed focal lengths and pair them with a wide maximum aperture, making for a versatile combo. However, such lenses are rarely cheap. The Sigma 28-70mm f/2.8 DG DN makes a few smart compromises to bring its price way down, and this excellent video review takes a look at the sort of performance and image quality you can expect from it in practice.