Back-illuminated 24.2MP12 full-frame sensor
The 35mm full-frame Exmor R™ CMOS image sensor features 24.2-megapixel resolution, back illumination, and gapless on-chip lens design for extraordinary sensitivity and dynamic range. Two times faster13 data readout speed is achieved through copper wires and front-end LSI.
Entirely enhanced image processing system
A combination of new-generation image processing system and a new sensor achieves an up to 1.5-stop improvement13 in image quality. A wide ISO sensitivity range of up to ISO 51200 is standard, and approx. up to 15-stop14 dynamic range at low sensitivity settings is realised. Upgraded Detail Reproduction and Area-specific Noise Reduction join to suppress noise and maintain a sense of high overall resolution. Colour reproduction, especially of skin and nature scenes, has also been dramatically improved. The α7 III also supports 14-bit RAW output15 even during silent shooting/continuous shooting.
Wider, faster, more steadfast AF performance
An evolved image processing system and α9 camera AF algorithms optimised for the α7 III improve AF speed, precision, and tracking performance. 693 phase-detection AF points and 425 contrast-detection AF points provide high-density wide-area coverage. AF speed improved by up to twice17 and more precise AF tracking performance let you capture and maintain focus on a quickly moving subject in unpredictable motion. The α7 III also autofocuses reliably down to EV-3 brightness18.
Focal-plane phase-detection AF supports A-mount lenses19
Phase-detection AF can operate even when an A-mount lens19 is mounted to the α7 III via an LA-EA3 adaptor. The 693-point focal-plane phase-detection AF system provides wide-area coverage, fast response, and high-performance tracking.
AF-ON button and multi-selector
The new AF-ON button activates autofocus without any half-press-shutter-button focus sequence, so you can concentrate better on exactly when to release the shutter and capture the moment instantly. A multi-selector lets you shift the point of focus quickly and efficiently. You can select and shift the point of focus intuitively, so you won’t miss great chances to shoot moving subjects.
Always keep the eye in focus
Eye AF newly supports AF-C mode with greater precision that dramatically enhances portrait shooting, plus higher AF speed that makes it easier to shoot a portrait of a moving subject, even if the subject looks down and away from the camera, or is backlit with face in partial darkness. The α7 III supports Eye AF for A-mount lenses20 mounted via an adaptor.
Enhanced operability for continuous shooting
Images captured in continuous shooting mode can be displayed as a group, and such groups can be deleted or protected in one quick operation. Furthermore, with higher burst capacity and UHS-II media compatibility, the camera significantly streamlines the operation of writing data to memory cards. The Fn button and menu button can be operated to change settings immediately after continuous shooting, while data writing is in progress23.
Up to 10 fps with AF/AE tracking21
With new shutter charge unit and image processing system refinements, the α7 III can shoot continuously at up to 10 fps with AF/AE tracking21 (up to 8 fps21 with minimal display lag in live-view continuous shooting mode) for easy, stable shooting of even intensely active subjects. Up to approximately 177 JPEG images (standard) in full resolution, 89 compressed RAW images, or 40 uncompressed RAW images can be captured in one continuous burst22. An electronic shutter allows silent, vibration-free shooting of wildlife and other sensitive situations when even slight noise can mean missing an ideal shot.
Flicker from fluorescent and other artificial lighting is automatically detected and shutter action is timed to minimise the flicker’s effect on still images. This suppresses exposure and colour anomalies at the top and bottom of images shot at high shutter speeds, as well as exposure and colour inconsistency between continuous shots, so you can take images indoors with more confidence.
Supports a wide range of needs in HDR movie production
Supporting a wide range of HDR movie production needs, the α7 III offers S-Log3 as well as S-Log2 gamma curves, for great flexibility to fine-tune images as desired through colour grading operation in post-production , and a new HLG (Hybrid Log-Gamma)27 picture profile for instant HDR workflow. However, colour grading is not required to enjoy instant playback of high-quality, true-to-life images  with no blocked shadows or blown highlights on an HDR (HLG) compatible TV.
Clear, natural, realistic 4K movies25
High-resolution full-frame 4K movies25 with full-pixel readout without pixel binning that condenses approximately 2.4 times26 the amount of data required for 4K movies (QFHD: 3840 x 2160) results in minimal moiré and jaggies. Advanced image processing makes it possible to record full-frame 4K movies with outstanding image quality in the mid-to-high ISO range, so you make the most of the 4K movie format’s unique potential in every shot. Super 35mm can also be selected, instead of full-frame mode, as needed.
Rating function convenient for on-location sorting
Ratings from 1 to 5 stars can be applied to still images and maintained as the images are imported into PlayMemories Home or the new Imaging Edge software suite from Sony running on a PC. This function and a protect function to prevent accidental image deletion can each be assigned to a custom button (C3 by default for protect). Ratings and protection can be applied via review playback display and continuous groups can be reviewed, protected, and deleted while you’re on location or traveling.
Dual slots with UHS-II compatibility
This camera provides two media slots for SD card (UHS-II-compatible for fast data writing) and SD card/Memory Stick, respectively. Two cards in the slots can be used to simultaneously record or relay record data; separate RAW data from JPEG data, or stills from movies; and copy data from one card to the other. The memory card cover is lockable to prevent it from being opened unintentionally.
Location Information Link via Bluetooth30
The camera can be paired with PlayMemories Mobile app31 installed on a compatible mobile phone or tablet device to acquire location data, record it on still images, and correct camera date/time and location settings.