Sony A7S III ILCE-7SM3/B Alpha 7S M3 Full-Frame Photo Video Camera

Key Features

• 12.1MP Full-Frame Exmor R BSI CMOS Sensor
• UHD 4K Video Recording at up to 120 fps, 10-Bit 4:2:2 Internal Recording
• 16-Bit RAW Output via HDMI
• 759-Point Fast Hybrid Autofocus System
• New BIONZ XR Image Processing Engine with 8x More Processing Power
• Low Noise Images with ISO up to 409,600 and 15+ Stop Dynamic Range
• Supports XAVC S, XAVC HS (HEVC), and XAVC S-I (All-Intra) Recording Formats

Sensor and Image Processing

The Sony α7S III features a new 12.1-megapixel full-frame back-illuminated Exmor R CMOS sensor that delivers exceptional light gathering, reduced rolling shutter, and a wide 15-stop dynamic range. The sensor supports focal-plane phase-detection autofocus for precise subject tracking.

Paired with the revolutionary BIONZ XR image processing engine, the camera offers up to eight times the processing power of previous models, enabling faster image processing, improved color reproduction, and reduced rolling shutter effects.

Video Capabilities

This camera excels in video performance, offering UHD 4K recording at up to 120 frames per second with 10-bit 4:2:2 internal recording. It supports advanced codecs including XAVC S, XAVC HS (HEVC), and All-Intra (XAVC S-I) encoding at bitrates up to 600 Mbps for high-quality footage.

16-bit RAW video output is available via HDMI to compatible external recorders, allowing professional-grade post-production workflows. The camera also supports simultaneous proxy recording to facilitate efficient editing.

Autofocus and Stabilization

The α7S III features a 759-point phase-detection autofocus system combined with 425 contrast-detection points, covering most of the frame for fast and accurate subject tracking. Real-time Eye AF and Real-time Tracking use AI to maintain precise focus on eyes and moving subjects, even with partially obscured faces.

Five-axis optical image stabilization with gyro sensors compensates for yaw, roll, and pitch movements. The new Active Mode enhances stabilization for handheld 4K video shooting without the need for a gimbal.

Color and Gamma Profiles

The camera includes Sony's S-Cinetone color profile for cinematic skin tones and natural mid-range colors, inherited from Sony's Cinema Line cameras. It also supports S-Log3 gamma and S-Gamut3.Cine color gamut for wide dynamic range and smooth color grading in post-production.

Hybrid Log Gamma (HLG) enables HDR video production directly in-camera for compatible displays without complex post-processing.

Additional Features

• Supports SDXC cards rated V90 for most formats (except certain high frame rate XAVC S-I modes)
• Digital audio interface on Multi Interface Shoe for 24-bit audio input
• Expandable ISO range for stills from 40 to 409,600
• Touchscreen LCD with Touch Tracking for intuitive subject selection

Included Accessories

• 128GB Memory Card
• Two Rechargeable Batteries
• Battery Charger

Optional Accessories Available for Rental

• 160GB CFexpress Type A Memory Card
• CFexpress Card Reader
• Sony E-Mount Lenses
• EF Lens Adapter (Sigma MC-11 Converter)
• Godox Ving Flash V860II for Sony

Usage Notes

The camera is designed for professional photo and video applications, offering exceptional low-light performance, high frame rate 4K video, and advanced autofocus capabilities. It is suitable for filmmakers, videographers, and photographers requiring high sensitivity and dynamic range.

SDXC cards rated V90 are compatible with all recording formats except XAVC S-I HD at 240 fps and XAVC S-I 4K at 60 fps (24 & 30 record fps) and 120 fps capture.