Sigma 24mm f/1.4 DG HSM Art Lens for Nikon F As part of the art Line within Sigma's Global vision series, this Lens' is designed to achieve truly notable optical performance and is ideally suited for creative and artistic applications. The prime 24mm focal length offers a versatile wide-angle perspective when Used on full-frame sensors, Fast f/1.4 maximum aperture is well-suited for working in Low-light conditions and Also provides greater control over the focus position when using shallow Depth of field techniques.