"The new Laowa 105mm f/2 Smooth Trans Focus Lens incorporates a unique optical design with an apodization (APD) element next to the aperture. The APD element resembles the function of an ND filter which becomes thicker towards the perimeter, gradually reducing the amount of light transmission towards the periphery to produce a soft, natural and beautifully diffused out-of-focus rendition (or called bokeh). E-Mount Lens/Full-Frame Format Aperture Range: f/2 (T3.2) to f/22 One Apodization Element for Smooth Bokeh Three Low Dispersion Elements One Extra Refractive Index Element Manual Focus and Manual Aperture Ring Dual Diaphragms: 8- and 14-Blades The Bokeh Dreamer An apodization element is incorporated to produce images with smooth and creamy bokeh while maintaining excellent sharpness at the focal plane. Two Diaphragms The new Laowa 105mm f/2 Smooth Trans Focus Lens offers two separate diaphragms. The stepless 14-bladed perfectly circular aperture, in conjunction with the apodization element gives this lens the ability to produce smooth and pleasing bokeh. It is also useful for videographers to control the amount of light passes through the lens. The 8-bladed aperture is to determine the effective aperture opening (f-number) and the depth-of-field formed. Complex Optical Structure The lens houses with 11 elements in 8 groups with 1 piece of High Refrac"