Sony Alpha a7S III Mirrorless Camera Body
Taking the S series to a whole new level of full-frame movie expression, spectacular new speed combines with supreme sensitivity and ultra-low noise to put previously impossible 4K movie shoots on the menu, with high dynamic range, breathtaking focusing, and extra-strong image stabilization. Your new creative potential awaits.
For visual trailblazers
With extreme full-frame movie performance including high sensitivity (expanded ISO up to 409600), 15-stop wide dynamic range, 4K 120p, fast and dependable autofocusing, and extra-strong image stabilization, the α7S III again raises the bar for movie makers.
Large pixels deliver high sensitivity and low noise
The new full-frame 12.1-megapixel back-illuminated Exmor R CMOS image sensor packs major innovations in light-gathering, wiring and output optimization. These deliver blazing doubled readout speeds, superb image quality throughout the whole sensitivity range, 15-stop wide dynamic range, and reduced rolling shutter, with the sensor also providing focal-plane phase-detection AF.
Up to 8x more powerful BIONZ XR image processor
Along with the new sensor and its unprecedented speed, the BIONZ XR image processing engine has also been newly developed and packs up to 8x more processing power. With a future-oriented architecture, it delivers high quality images faster for superlative still and video expression, as well as dramatically improved camera interface responsiveness.
Stunning AF performance even at 4K 120p
The new Exmor R full-frame image sensor and revolutionary BIONZ XR image-processing engine deliver always-active pinpoint AF for astonishing detail in both space and time, and stunning 4K movies even at 120 frames per second or in slow motion. With the resolution and depth of field only possible from a full-frame sensor, the results are spectacular.
10-bit 4:2:2 recording
Record right on the camera with the amazing richness of 10-bit depth and 4:2:2 color sampling, for far greater flexibility in image grading, post-processing and compositing.
All-Intra encoding available
As well as Long GOP, All-Intra encoding is now provided. This encodes every frame independently at bitrates up to 600 Mbps, to capture complex motions more accurately for recording on either internal or external media, and allow more efficient editing workflows.
Superior quality and smaller files with XAVC HS
The new XAVC HS recording format uses HEVC/H.265 encoding to achieve twice the compression efficiency of AVC/H.264 encoding, for superior image quality and smaller file sizes.
Sony's renowned sensitivity delivers expanded ISO 409600
The renowned sensitivity of the series scales new heights, with an expanded ISO range for movies from 80 to a remarkable 409600 (standard range 80–102400). With advanced light-gathering and output optimization, the 12.1-megapixel full-frame sensor achieves low noise throughout the sensitivity range, and can capture usable images in near-total darkness.
S-Log3 gamma, S-Gamut3.Cine gamut as on pro camcorders
The S-Log3 gamma curve and S-Gamut3.Cine color gamut, shared with pro camcorders, provide wider dynamic range and easier color matching for smoother post-production workflows.
HLG (Hybrid Log-Gamma)
HLG (Hybrid Log Gamma) simplifies HDR production, producing footage for HLG-compatible BRAVIA TVs on the camera with no complex post-production, and smooth gradations from the 10-bit color depth.
Image quality improvements
The new BIONZ XR image processing engine delivers improvements in color reproduction, stability against different light sources, natural tonal gradation and roll-off, and reduced rolling shutter.
16-bit RAW HDMI output
For demanding post-production workflows, 16-bit RAW output is available via HDMI connection to compatible external recorders while XAVC HS 4K, XAVC S 4K, or XAVC S-I 4K, and proxy files are simultaneously captured in-camera.
Efficient editing through proxy recording
While recording high-bitrate 4K movies, HD proxies (in 8 or 10-bit depth) can be generated in-camera. Editing the smaller proxy files reduces computer load and speeds up workflow prior to final 4K delivery.
Fast Hybrid AF for accuracy and tenacity
The wide-area AF uses intelligent tracking and on-sensor phase-detection covering most of the frame. The result is that every bit of supremely accurate and tenacious AF performance is extracted in combination with high-quality E-mount lenses, even when shooting moving subjects at shallow depths-of-field in 4K and at 120p frame rates.
Powerful focus control for solo shooters
With AF Transition Speed selectable over 7 levels, and AF Subject Shift Sensitivity over 5 levels, you can better convey your creative intentions when switching subjects or, for example, rack focusing. A simple touch can temporarily activate AF even during manual focus operation.
Real-time Eye AF for movies
Real-time Eye AF uses AI to ensure pinpoint focusing precision for eyes, with performance now improved by 30% on profile or partially-obscured faces. Tenacious eye tracking lets you concentrate on composition even with a shallow focus depth.
Real-time Tracking with intuitive touch operation
Real-time Tracking analyzes subject color, pattern, depth, and face information to track the subject. Touch Tracking intuitively and automatically tracks a subject touched on the LCD screen.
In-body 5-axis image stabilization
A highly accurate image stabilization unit and gyro-sensor are provided, delivering 5-axis optical image stabilization.
Active Mode for hand-held shooting
The new Active Mode provides increased stabilization for movie shooting. To preserve image quality, the BIONZ XR processor accurately measures camera shake and compensates optically. This makes stable video possible even when shooting hand-held where space restraints prevent gimbal use, while walking, and at 4K resolution.
Digital audio interface for clear sound recording
A digital audio interface added to the Multi Interface (MI) Shoe allows direct 24-bit input. Available settings are 48 kHz/16-bit 2-ch, and by using the optional XLR-K3M adapter kit, 48 kHz/24-bit 2-ch and 48 kHz/24-bit 4-ch.
Unique heat dissipation, for dependable recording
A unique Sony Σ (sigma) shaped graphite heatsink is built into the image-stabilization unit. This dissipates heat 5x more effectively for extended recording time, without interfering with image stabilization.
Responding to feedback from professional users, the MOVIE button has been moved to the top face for improved operability in any shooting position. Mode dial ordering and speed of switching have also been improved.
High ISO sensitivity
With an amazingly wide standard ISO range of 80–102400 (expandable to 40–409600 for stills), the α7S III offers incredible creative opportunities. The newly-developed image sensor and image processing algorithms produce even cleaner images and more natural textures than the previous α7S II model, even when shooting in near total darkness.
Fast Hybrid AF for stills
The Fast Hybrid AF system combines speed and precision. With 759 focal plane phase-detection sensors and 425 contrast-detection points distributed across most of the image area, the α7S III quickly finds and tracks your subject throughout the frame.
Outstanding continuous shooting performance
Use your choice of mechanical or electronic shutter for continuous burst shooting, with AF/AE tracking, at up to 10 fps. Capture decisive moments with over 1,000 frames of continuous uncompressed RAW shooting possible.
Highly-sensitive AF for low-light focusing
AF algorithm advances have allowed the α7S III to achieve autofocus in lighting conditions as dim as EV-6, where subjects are barely even visible with the naked eye.
Still-image quality advances through new sensor and engine
The newly-developed image sensor and image processing engine deliver improvements in color reproduction, particularly of skin tones, and texture depiction in still images.
New HEIF format and HLG image capture modes
The HEIF image file format is supported, offering better image quality and greater compression efficiency than JPEG, plus 10-bit color. High Dynamic Range still images can also be captured in HLG mode for viewing on compatible TVs.
Two CFexpress Type A-compatible media slots
Both card slots support both ultra-fast CFexpress Type A cards, allowing high-bitrate recording and fast buffer clearance, and SDXC UHS-II cards. Parallel and Relay recording are also available.
Vari-angle LCD monitor for comfortable movie shooting
The variable-angle 1.44 million-dot 3.0-type touch screen features a side-open design, for flexible positioning and improved visibility when mounting on gimbals or rigs.
9.44 million-dot high-definition electronic viewfinder
The new EVF offers resolution, contrast and color unlike anything in its class. It also offers world-leading 0.9x finder magnification, a 41 ° diagonal field of view, and a 25-mm-high eyepoint.
The menu structure has been redesigned to reflect feedback from both pro photographers and videographers. Camera settings are now more intuitive and the camera is more responsive to setting changes.
New menu structure
Based on requests from our most demanding professional users, major improvements have been made to the menu structure, for improved at-a-glance readability and reduced menu navigation.
Intuitive touch operation
The menu screen can be operated by touch, while the playback screen features swiping, and pinch-to-zoom. Operability of the touch functions when shooting has also been improved.
5 GHz Wi-Fi compatible
As well as 2.4 GHz, 5 GHz Wi-Fi connectivity is provided for remote operation, wireless preview, and faster and more stable data transfer of both still images and video.
Wired LAN connectivity
For complex, interference-prone environments, or higher bandwidth needs, 1000BASE-T wired LAN connectivity is available by connecting a compatible USB-Ethernet adapter cable to the camera's USB Type C port.
Remote preview and shooting
Either wired or wireless remote shooting is available from a PC, or from a mobile device with Imaging Edge Mobile installed, for more efficient workflows and shooting in challenging environments.
- 12.1MP Exmor R sensor, optimized for 4K, sensitivity and speed
- New BIONZ XR processing engine delivers 8x more processing power
- Low noise images w/ ISO up to 409,600 and 15+stop dynamic range
- Up to 4K 120p 10-bit 4:2:2 and full pixel readout in all rec. modes
- Up to 4K 120p in XAVC S (AVC), XAVC HS (HEVC) and XAVC S-I (All-I)
- Up to 4K 60p 16-bit RAW video output via HDMI Type-A connector
- Effective internal heat dissipation enables 1-hour 4K 60p recording
- Fast readout for high frame rates, faster AF, minimal rolling shutter
- No 29m 50s continuous recording limit for movie shooting
- 3" flip-out, vari-angle LCD monitor w/ touch menu and controls
- Dual card slots, both compatible with CFexpress Type A and SDXC/SDHC
- World's first 9.44M dot QXGA OLED eye-level viewfinder
- Incredible autofocus w/ 759 phase detection AF points, 92% coverage
- 30% improved Real-time Eye-AF and Real-time AF tracking down to EV-6
- 5-axis in-body image stabilization with selectable Active mode
- New menu layout w/ intuitive 3 level structure and touch navigation
- Robust magnesium alloy body w/ dust and moisture resistant sealing
- MI shoe with digital audio interface up to 4ch. 24bit capability
- SuperSpeed USB-C with power delivery and Ethernet wired LAN
- Long Z-battery life extendable via USB Type C with Power Delivery
- Picture Profiles including 10-bit 4:2:2 HLG and S-Log 2 & 3
- 10 in-camera customizable Creative Looks for stills and movies
- 7x adjustable AF Transition Speeds, 5x AF Subject Shift Sensitivity
- Up to 1000 RAW+JPEG at 10fps w/ continuous autofocus and exposure
- 10-bit HEIF HLG still capture with selectable 4:2:0 or 4:2:2 sampling
- Class leading compact size and weight
- Visible Light and IR Sensor improves WB accuracy in artificial light
- High-speed 2.4 and 5GHz Wi-Fi15 / FTP transfer and wireless PC remote
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