Sony a7S III Mirrorless Camera
Key Features
- 12.1MP Full-Frame Exmor R BSI CMOS Sensor
- 4K 120fps Video Recording (10-bit 4:2:2)
- Dual Native ISO (up to ISO 409600)
- 759-Point Fast Hybrid Autofocus
- Real-time Eye AF (Human & Animal)
- 5-Axis In-Body Image Stabilization (IBIS)
- BIONZ XR Image Processor
- 16-bit RAW Output via HDMI
- Fully Articulating 3" Touchscreen LCD
- 9.44M-dot OLED Electronic Viewfinder
- Dual Card Slots (CFexpress Type A & SD UHS-II)
- Passive Cooling System for Long Record Times
- Magnesium Alloy Weather-Sealed Body
- S-Log3, S-Cinetone, HLG for HDR workflows
Sony a7S III Mirrorless Camera Overview
The Sony a7S III is a full-frame mirrorless camera built specifically for professional video creators and low-light photographers. As part of Sony’s Alpha series, it continues the legacy of the a7S line with a strong emphasis on high-sensitivity performance, advanced video features, and reliability in demanding conditions.
At its core, the a7S III features a 12.1MP back-illuminated (BSI) CMOS sensor designed to excel in low-light environments. Paired with the powerful BIONZ XR processor, the camera delivers enhanced speed, improved color processing, and excellent noise control even at extremely high ISOs—up to 409600.
A standout feature of the a7S III is its 4K video capability, offering up to 120 frames per second (fps) in 10-bit 4:2:2 internally. It also supports 16-bit RAW output via HDMI, enabling high-end post-production workflows. The camera includes professional video tools like S-Log3, S-Cinetone, and HLG profiles, making it ideal for cinematic content creation and HDR delivery.
The autofocus system is another major strength, with 759 phase-detection points and Real-time Eye AF for both humans and animals. This ensures accurate and reliable subject tracking, even in challenging lighting. The 5-axis in-body image stabilization (IBIS) provides up to 5.5 stops of compensation, making handheld shooting smoother and more stable.
The camera’s body is built to withstand professional use, featuring a magnesium alloy chassis, weather sealing, and a fanless thermal design that allows for extended recording times without overheating. It includes a fully articulating 3-inch touchscreen for flexible composition, and a high-resolution 9.44M-dot OLED viewfinder, one of the sharpest on the market.
For media, the a7S III offers dual card slots that support both CFexpress Type A and UHS-II SD cards, giving users flexibility and speed for high-bitrate recording.
Overall, the Sony a7S III is a purpose-built powerhouse for filmmakers, content creators, and professionals who demand top-tier performance in both video and still photography under extreme lighting conditions.
