To the surprise of many, the Sony A7R III retains the same 42MP sensor as the A7R II.
We’re disappointed however, as:
- No HEVC
- No 10-bit (doesn’t even appear to do 10-bit out)
- No 4K 60P
On the plus side:
- Better/faster AF
- Dual card slots
- Double the size battery of the A7R II
- 5K (15MP) over-sampling for 4K video
- Improved 5-axis IBIS
- Claims 14 stops of dynamic range for video, but the codec cripples this making this claim dubious at best
High Quality 4K for the Video Professionals
The new α7R III is exceptionally capable as a video camera, offering 4K (3840×2160 pixels) video recording across the full width of the full-frame image sensor. When shooting in Super 35mm format, the camera uses full pixel readout without pixel binning to collect 5K[xviii] of information, oversampling it to produce high quality 4K footage with exceptional detail and depth.
A new HLG (Hybrid Log-Gamma)[xix] is available on the α7R III that supports an Instant HDR workflow, allowing HDR (HLG) compatible TV’s to playback beautiful, true-to-life 4K HDR imagery. Further, both S-Log2 and S-Log3 are available for increased colour grading flexibility. The camera can also record Full HD at 120 fps at up to 100 Mbpsvi, allowing footage to be reviewed and eventually edited into 4x or 5x slow motion[xx] video files in Full HD resolution with AF tracking.