Sony Alpha a7S III Mirrorless Digital Camera

Quick Overview

• 12MP Full-Frame Exmor R BSI CMOS Sensor
• UHD 4K 120p Video, 10-Bit 4:2:2 Internal
• 16-Bit Raw Output, HLG & S-Cinetone
• 759-Point Fast Hybrid AF
• 9.44m-Dot QXGA OLED EVF
• 3.0" 1.44m-Dot Vari-Angle Touchscreen
• 5-Axis SteadyShot Image Stabilization
• Extended ISO 40-409600, 10 fps Shooting
• Dual CFexpress Type A/SD Card Slots

Product Description

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 RTM 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 XRTM 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.

Our 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.

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.

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.

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.