The Sony FE 100mm f/2.8 STF GM OSS Lens stands out as a unique offering in Sony's G Master lineup, tailored for photographers who prioritize exquisite background defocus and sharp subject rendering.

At the heart of this lens is the Smooth Trans Focus (STF) technology, achieved through an integrated apodization (APD) filter. This optical element ensures that out-of-focus areas transition smoothly, producing bokeh that is soft and natural, devoid of harsh edges or distracting artifacts. Such characteristics are particularly beneficial for portraiture, where subject isolation and background rendition are paramount.

Despite its f/2.8 aperture, the presence of the APD filter results in a light transmission equivalent to T5.6.This means that while the depth of field corresponds to f/2.8, the actual light-gathering capability is reduced, necessitating consideration in low-light scenarios.

The lens construction comprises 13 elements in 10 groups, including one aspherical and one extra-low dispersion (ED) element, ensuring high resolution and minimal chromatic aberration.The 11-blade circular diaphragm further enhances the quality of bokeh, maintaining a nearly circular aperture even when stopped down.

For stability, the Optical SteadyShot (OSS) system compensates for camera shake, facilitating sharper images during handheld shooting. The Direct Drive Super Sonic Motor (DDSSM) ensures autofocus is both swift and silent, crucial for capturing fleeting moments and for video applications.

Additionally, the lens offers a 0.25x magnification with a minimum focusing distance of 0.57 meters, allowing photographers to capture detailed close-ups. The physical aperture ring, complete with a de-click switch, provides tactile control over exposure settings, catering to both photographers and videographers.

Constructed with a dust- and moisture-resistant design, this lens is built to withstand challenging shooting environments, ensuring reliability and durability.