The Sony a7R Mark III is the company’s latest high-resolution full frame mirrorless camera. Much like Nikon’s recent D850, it’s one that combines this resolution with high speed and fast autofocus capabilities to a degree we’ve not previously seen.
Like its predecessor, the Mark III is built around a 42MP BSI CMOS sensor, but unlike the a7R II, it can shoot at ten frames per second.
Essentially it can be seen as an a7R II that inherits many of the lessons learned from the company’s pro-sports model, the a9. This means faster processing, improved autofocus, improved handling and ergonomics, as well as the adoption of a much larger battery. While some of the individual changes are subtle, they very quickly combine to produce a hugely capable and highly useable camera.
- 42MP BSI CMOS sensor
- Faster, lower-noise image processing
- 10 fps shooting with full AF, 8 fps with ‘live’ updates between shots
- 3.69M dot (1280 x 960 pixel) OLED viewfinder
- Improved autofocus, including more tenacious Eye AF mode
- 5-axis image stabilization, rated at 5.5 stops (CIPA) with 50mm lens
- 4K footage from ‘Super 35’ crop region oversampled from 5K capture
- Video AF less inclined to refocus to background
- ‘Picture Profile’ video gamma/gamut modes including S-Log2 and 3
- Twin SD Card slots (one UHS-I and one UHS-II compatible)
- Bayer-cancelling multi-shot mode for improved resolution
- True 14 bit uncompressed Raw, even in continuous drive mode
- Use of phase detection (including Eye AF) at 3 fps with adapted lenses
Sony says the a7R III is based around the same 42MP back side illuminated CMOS sensor as its immediate predecessor, so doesn’t gain the full speed advantages of the a9’s Stacked CMOS chip (in terms of AF performance, continuous shooting rate or reduced rolling shutter in video and electronic shutter mode). However, the adoption of the processing systems, algorithms and refinements introduced on → continue…