Manufacturer description: The Sony FE 100mm F2.8 STF GM OSS’ defocus capabilities are made possible by the lens’ advanced optical structure, as it features a newly designed 11-bladed aperture and a unique optical apodization lens element. Similar to a neutral density filter that increases in density towards the edges, the apodization element creates beautiful transitions of in-focus to out-of-focus areas within an image, making for exceptionally soft, smooth bokeh that adds depth and dimensionality.
The lens supports both contrast AF and focal-plane phase detection AF, and has a high-precision, quiet direct drive SSM (Super Sonic Motor) system that ensures exceptionally fast and accurate AF performance. The SEL100F28GM also offers up to 0.25x close-up capabilities with a built-in macro switching ring, built-in Optical SteadyShot image stabilization, a customizable focus hold button, AF/MF switch, aperture ring and more. It is dust and moisture resistant as well.