SIGMA LENS 30/1.4 DC DN F/EOS MA fast, versatile prime, this 30mm f 1. 4 DC DN Contemporary Lens from Sigma is designed for use with Canon EF M mount mirroless cameras. The bright f 1. 4 maximum aperture benefits working in low light conditions and also affords extensive control over depth of field for using selective focus techniques. The optical design features a pair of aspherical elements, along with one high refractive index element, which significantly reduce spherical