A very popular 35mm full-frame mirrorless system, which includes cameras for both amateur and professional photographers. The "S" models are optimized for low noise at high ISOs, while the "R" models are high resolution cameras. Since the second generation, A7 series cameras have been equipped with sensor-shift image stabilization technology.
The lens lineup consists of several series: (1) relatively inexpensive models designed for amateur photographers, (2) lenses developed in collaboration with Zeiss, (3) professional G series models, and (4) Grand Master series models, which are high-end professional optics optimized for high resolution and attractive bokeh.