Affording an expansive field of view, the Super Wide-Heliar 15mm f/4.5 Aspherical III Lens from Voigtlander is dedicated to full-frame Sony E-mount cameras, and features an updated Heliar design to limit distortion and maintain consistent illumination to suit mirrorless camera designs. One aspherical element is also used in the 11 elements, 9 groups design, and helps to reduce spherical aberrations throughout the aperture range. The manual focus design affords fine-tuned control over focus placement, along with a minimum focusing distance of 11.8", and a Selective Aperture Control System allows you to de-click the manual aperture ring for smooth, silent exposure adjustment to benefit filmmaking applications.