Viltrox 50mm f/1.8 Fe lens is an autofocus wide-angle prime lens designated for Sony full frame mirrorless camera. It supports lens Is stabilization, Exif information transmission and Usb upgradeOptical Design:11 elements in 10 groups, including 2 extra-low dispersion elements, 2 high refractive index elements, 2 aspherical elements.Two extra-low dispersion elementsReduce color fringing and chromatic aberrations in order to achieve a high degree of clarity and color accuracy.Two high refractive index elementsHelp to control spherical aberrations and reduce distortion in order to realize high sharpness and accurate rendering.Two aspherical elementsMinimize distortion and spherical aberrations in order to produce high sharpness and accurate rendering.Compact and LightweightRugged all-metal mirror body structure, ensure lens assembly. Compact and lightweight, only 340g.Large ApertureBright f/1.