A wide-aperture 50mm lens is often one of the most versatile options in a photographer's bag, suitable for a lot of work ranging from portraiture to low-light events. A lesser-known option is the Irix 45mm f/1.4, which offers some unique features along with an interesting focal length, all put together in a rugged package that can handle a variety of tough shooting scenarios. This excellent video review takes a look at the lens and the kind of performance and image quality you can expect from it in practice.