Delivering both smooth bokeh and fine sharpness, the FE 100mm f/2.8 STF GM OSS Lens from Sony is a short-telephoto prime featuring a unique, yet sophisticated optical design.

Separating itself from other portrait-length lenses, this 100mm f/2.8 features Smooth Trans Focus (STF) technology, which uses an apodization filter to realize notably smooth bokeh with rounded out-of-focus highlights in both the foreground and background. Contributing to a high degree of sharpness and clarity, the lens also incorporates one aspherical element and one extra-low dispersion element to suppress both spherical and chromatic aberrations.

NOTE: Effective Maximum f/stop
Please note that this lens has a built in apodization filter which improves the look of the bokeh, but in turn reduces the amount of light that can pass through the lens. The loss of light is two full stops, making the maximum f/stop of this lens 5.6. Internally it is an f/2.8, but the maximum aperture setting that can be achieved through the camera will be 5.6.