The Sony a7S III is a full-frame mirrorless camera built around a 12.1-megapixel back-illuminated Exmor R CMOS sensor and BIONZ XR image processing engine, optimized primarily for exceptional video capability and low-light performance rather than high-resolution stills output. The relatively low pixel count allows for larger individual photosites, contributing to the camera’s outstanding high ISO performance and wide dynamic range. Video capabilities are extensive, including internal 4K recording at up to 120fps with 10-bit 4:2:2 color, 16-bit RAW output via HDMI, and support for S-Log3 and S-Cinetone color profiles for post-production flexibility. Five-axis in-body optical image stabilization provides effective compensation during handheld shooting, and a 759-point phase-detection autofocus system with Real-time Tracking and Eye AF delivers reliable subject tracking. A fully articulating rear touchscreen and high-resolution 9.44-million-dot electronic viewfinder offer flexible monitoring options.
– 12.1-megapixel back-illuminated Exmor R CMOS sensor
– BIONZ XR image processing engine
– Optimized for low-light and video performance
– Internal 4K video at up to 120fps, 10-bit 4:2:2
– 16-bit RAW output via HDMI
– S-Log3 and S-Cinetone color profile support
– Five-axis in-body optical image stabilization
– 759-point phase-detection autofocus with Real-time Tracking and Eye AF
– Fully articulating rear touchscreen
– 9.44-million-dot electronic viewfinder
– Native Sony E-mount, full-frame coverage
– Body only — no lens included

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