Sigma's Art series of lenses features some of the most highly regarded options in the industry, offering impressive image quality at prices that often significantly undercut those of first-party options. The 105mm f/1.4 DG HSM Art is the longest focal length in the lineup with an f/1.4 maximum aperture, making it an intriguing option for portrait and wedding shooters. This great video review takes a look at the lens and the sort of performance and image quality you can expect from it in practice.