Type: SIGMA 30mm f/1.4 DC DN Contemporary Lens for Sony Mirrorless Cameras and APS-C format e-mount The lens is made in Brazil and features a maximum aperture of f/1.4, high-quality optical design with aspherical and high-refractive index elements, and a stepping AF motor for smooth, near-silent autofocus.
Worked well on canon T3i but since its cropped sensor it does make more then 50 mm. Great in low light for both video and picture taking. fast focusing compared to the 1.8 version and feel well made.