E-Mount Lens/APS-C Format, 82.5mm (35mm Equivalent), Aperture Range: f/1.4 to f/16, Multi-Layer Coating, Manual Focus Design, 9-Blade Diaphragm. Featuring improved optics and a more robust design the black Sony E-mount 55mm f/1.4 Mark II Lens from 7artisans is a fast and compact portrait-length prime well-suited for portrait photography. It can be used in facial close-up half-length portrait and full-body portrait to obtain excellent background blur effect. Its bright f/1.4 maximum aperture benefits working in low lighting and also enables isolating subject matter using selective focus and shallow depth of field. The six elements five groups optical design is enhanced with a multi-layer coating that helps to suppress flare and ghosting for improved contrast and color rendering in a variety of lighting conditions. Additionally the smooth manual focus design of the lens permits working with subjects as close as 1.4' away and its 9-blade diaphragm contributes to a pleasing bokeh quality.