The wide-aperture 50mm lens is, by far, one of the most common lenses out there, and for good reason, as it is also one of the most versatile, able to tackle a humongous range of scenarios and needs thanks to its neutral focal length and top-notch low-light and narrow depth of field capabilities. Both Sigma and Sony have recently released professional-level 50mm f/1.4 options. So, which is right for you? This excellent video comparison looks at both to help you decide.