Sony FE 100 mm f/2.8 STF GM OSS camera lens

Creative 100 mm prime with STF bokeh

This Sony E‑mount full‑frame telephoto prime combines G Master resolution with an apodization element that produces exceptionally smooth bokeh. It covers a 24 degree angle of view on 35 mm format and 16 degree on APS‑C. The lens uses 13 elements in 10 groups including one aspherical and one ED element with Nano AR coating. Photographers who want a dedicated portrait and close‑up tool with artistic background rendering will appreciate the unique STF character.

Practical limits of the f/2.8 STF design

The effective transmission aperture is T5.6 at the brightest setting, so exposures are darker than the geometric f/2.8 suggests; the minimum aperture reaches f/20 (T22). Autofocus operates only on Sony E‑mount bodies with DDSSM support. Close‑focus magnification reaches 0.25x at the 0.57 m‑1.0 m focus range and 0.14x at the 0.85 m‑infinity range. Builders who need faster effective light transmission or higher macro magnification should consider other optics.

Installation and common issues

The lens mounts directly on any Sony E‑mount camera and uses a 72 mm filter thread for accessories. A focus‑range switch lets you select between the two distance windows for quicker AF acquisition. Optical SteadyShot stabilization is built in and works automatically on compatible bodies. Ensure the apodization element is clean, as dust on this surface affects bokeh smoothness more noticeably than on conventional lenses.