The technical details behind this camera The Sony 85mm f/1.4 GM lens is a fast, short telephoto lens designed for its E-Mount mirrorless cameras. The optical design incorporates three extra-low dispersion elements as well as one extreme aspherical element, to enhance image sharpness and clarity. Smooth bokeh In addition to the f/1.4 aperture, bokeh is enhances by an 11-blade circular diaphragm, which produces a smooth, soft-edged bokeh. The Super Sonic wave Motor is also quick and quiet to provide excellent autofocus, while the construction of the lens is dust and moisture sealed. G Master series Advances in camera performance and soaring creative ideals demand a new approach to lens technology. Lenses must evolve to remain ahead of the curve. With a clear vision of cameras of the future, Sony now redefines the lens with its G Master series. High resolution and appealing bokeh together at last, from the leader in imaging innovation.