The "basic" model, which sits alongside the high-end A7R III, also has an improved processing engine, which Sony says will allow the camera to shoot faster at a wide range of ISO settings while still delivering high quality images.
The auto focus system has also been tweaked to improve performance in low light conditions and on moving subjects. The camera's Eye AF mode can lock onto a person's eye, helping it keep up with movement even when an eye is obscured by movement or other objects.
The A7 III can shoot at 10fps, while an anti-flicker function improves the quality of images taken under artificial lighting by detecting the light's frequency and timing the shutter accordingly.
Other features include a high resolution viewfinder and monitor, Wi-Fi photo transfer to your devices, and what Sony claims to be the longest battery life of any mirrorless camera – the new model operates for twice as long as the old A7 II, completing up to 710 shots per charge.
The A7 III will be available in Europe in March, for around £2,000 for the body, or £2,200 with a lens included.