Back in 2017, Sigma released the 14mm f/1.8 Art, a lens which offered the widest maximum aperture seen in a full frame 14mm lens by more than a full stop. Now, they have released the 14mm f/1.4 DG DN Art, which offers even more light-gathering power and sits as the world's widest f/1.4 full frame lens. Can its performance and image quality match those impressive specs? This great video review takes a look at what you can expect.