Sony (SEL100F28GM) FE 100mm F2.8 STF GM OSS Lens

a special 100mm mid-telephoto lens equipped with STF (Smooth Trans Focus) technology. That can take G Master resolution portraits and other subjects that benefit from smooth background bokeh to new artistic heights. Along with close-up capabilities of up to 0.25x magnification and quick, accurate, and quiet autofocus. The Sony FE 100mm F2.8 STF GM OSS Lens also has a wide aperture range. Optical SteadyShot image stabilization minimizes blur. Unique Smooth Trans Focus G MasterG Master design combines extraordinary sharpness and smooth Bokeh in one lens.  STF (Smooth Trans Focus) realizes an ultimate collaboration of impressive bokeh and high resolution that only Sony can offer. It is not easy to achieve a spatial frequency of 50 line pairs per millimeter at a lens’ widest aperture and produce smooth beautiful bokeh at the same time, but that is Sony’s baseline for G Master design.

Unprecedented resolution and other demanding design parameters yield outstanding reproduction of the most detailed subjects and scenes with superior contrast throughout every frame. In addition, the G Master resolution is simply the highest in its class. The apodization component eliminates highlight distortion. Moreover, the STF lens’s unusual optical apodization element creates an exceptionally smooth background and foreground bokeh. Which is one of its distinguishing features. The APD element acts as a graduated neutral density filter, with light transmissivity highest at the center and then gradually decreasing towards the periphery to ensure an extraordinarily smooth bokeh.