Sony a7S III

12MP full-frame BSI-CMOS sensor | In-body stabilization | 4K capture up to 120p

What we like:

  • Over 60 mins of 4K/60p capture
  • In-body image stabilization
  • Ultra-high-res EVF
  • Excellent AF system

What we don't:

  • Low resolution for still shooting
  • Full EVF resolution only in playback mode
  • Waveforms would be a valuable addition
  • No shutter angle control for 24/60/120 shooting
The Sony a7S III is the most video-focused of the a7 series of full-frame mirrorless cameras. It uses a 4K-optimized, image stabilized 12MP BSI CMOS sensor.
The a7S III has a fully articulated screen and a large, comfortable hand grip, making it comfortable camera to shoot video with, despite its DSLR-shaped body. Buttons and dials are well placed and an updated menu system is much easier to navigate than previous Sonys.
The a7S III is the most video-focused a7 camera yet
The a7S III includes on-sensor phase detection and Sony's latest AF system, making it very good at identifying and tracking subjects, and maintaining focus on people even if they look away from the camera. A large battery gives the a7S III a good level of endurance for video shooting.
The move to 10-bit capture provides a huge boost to grading flexibility, and is available at up to 4K/120. We found the 16-bit Raw output required a lot of work just to compete with the attractive OOC footage. Video AF isn't quite as dependable as in stills but is some of the best you'll find.
The a7S III is capable of very good stills image quality, with excellent Raw performance and a very good JPEG engine. However, the very slight advantage the camera gives at very high ISO settings probably isn't worth the detail loss of having to shoot at 12 megapixels.
The a7S III is the most video-focused a7 camera yet. Its combination of high quality capture, built-in stabilization and reliable autofocus gives a very capable camera for a range of high-end videography where a small, lightweight camera is beneficial. It's a powerful little production tool.

Richard Butler