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Optimized video, optimized sensitivity, optimized speed, the Sony Alpha a7S III raises the bar for what a full-frame mirrorless camera is capable of. A revised 12.1MP Exmor R BSI CMOS sensor and updated BIONZ XR image processor offer faster performance, improved noise reduction, and a wider dynamic range, along with UHD 4K 120p video recording and internal 10-bit 4:2:2 sampling.
Video is the primary application of the a7S III, and improvements to the sensor and processor enable faster readout speeds and greatly reduced rolling shutter, along with high-bitrate internal recording, 16-bit raw output via the full-size HDMI port, and flexible control over motion with variable frame rate selection. The a7S III also does away with recording time limits and incorporates HLG for direct HDR production as well as S-Log2/S-Log3 gamma profiles for advanced HDR production with editing.
The updated sensor design also brings improved autofocus performance via 759 phase-detection points, which offer intelligent subject tracking and Real-time Eye AF to ensure critical focus on moving subjects in all recording modes. The sensor and BIONZ XR processor also facilitate impressive sensitivity, with an expanded range from ISO 40-409600, as well as fast 10 fps continuous shooting for up to 1000 consecutive raw frames. Additionally, 5-axis SteadyShot INSIDE sensor-shift image stabilization is available, too, which minimizes the appearance of camera shake by up to 5.5 stops.
Complementing the imaging assets, Sony has also made some changes to the a7S III's physical design, including a rear LCD with a side-open articulating design and an impressive 9.44m-dot OLED electronic viewfinder. The camera's menu system has also been updated for more intuitive navigation and the body design helps to promote better heat dissipation for improved continuous recording capabilities. Additionally, dual memory card slots both support working with CFexpress Type A or SD UHS-II memory cards for flexible and high-speed file storage.
| Lens Mount | Sony E |
| Camera Format | Full-Frame (1x Crop Factor) |
| Pixels | Actual: 12.9 Megapixel Effective: 12.1 Megapixel |
| Maximum Resolution | 4240 x 2832 |
| Aspect Ratio | 1:1, 3:2, 4:3, 16:9 |
| Sensor Type | CMOS |
| Sensor Size | 35.6 x 23.8 mm |
| Image File Format | JPEG, Raw, HEIF |
| Bit Depth | 14-Bit |
| Image Stabilization | Sensor-Shift, 5-Axis |
| ISO Sensitivity | Auto, 80 to 102400 (Extended: 40 to 409600) |
| Shutter Speed | 1/8000 to 30 Second Bulb Mode |
| Metering Method | Center-Weighted Average, Highlight Weighted, Multiple, Spot |
| Exposure Modes | Aperture Priority, Manual, Program, Shutter Priority |
| Exposure Compensation | -5 to +5 EV (1/3 EV Steps) |
| Metering Range | -3 to 20 EV |
| White Balance | Auto, Cloudy, Color Temperature, Color Temperature Filter, Custom, Daylight, Flash, Fluorescent (Cool White), Fluorescent (Day White), Fluorescent (Daylight), Fluorescent (Warm White), Incandescent, Shade, Underwater |
| Continuous Shooting | Up to 10 fps at 12.1 MP for up to 1000 Frames (Raw) / 1000 Frames (JPEG) Up to 8 fps at 12.1 MP Up to 6 fps at 12.1 MP Up to 3 fps at 12.1 MP |
| Interval Recording | Yes |
| Self-Timer | 2/5/10-Second Delay |
| Recording Modes | H.265/XAVC HS 4:2:2 10-Bit UHD 4K (3840 x 2160) at 23.976p/25p/29.97p/50p/59.94p/100p/119.88p [50 to 280 Mb/s] H.265/XAVC HS 4:2:0 10-Bit UHD 4K (3840 x 2160) at 23.976p/25p/29.97p/50p/59.94p/100p/119.88p [30 to 200 Mb/s] H.264/XAVC S-I 4:2:2 10-Bit UHD 4K (3840 x 2160) at 23.976p/25p/29.97p/50p/59.94p [240 to 600 Mb/s] Full HD (1920 x 1080) at 23.976p/25p/29.97p/50p/59.94p [89 to 222 Mb/s] H.264/XAVC S 4:2:2 10-Bit UHD 4K (3840 x 2160) at 23.976p/25p/29.97p/50p/59.94p/100p/119.88p [100 to 280 Mb/s] Full HD (1920 x 1080) at 23.976p/25p/29.97p/50p/59.94p/100p/119.88p/200p/239.76p [50 Mb/s] H.264/XAVC S 4:2:0 8-Bit UHD 4K (3840 x 2160) at 23.976p/25p/29.97p/50p/59.94p/100p/119.88p [60 to 200 Mb/s] Full HD (1920 x 1080) at 23.976p/25p/29.97p/50p/59.94p/100p/119.88p/200p/239.76p [16 to 100 Mb/s] |
| External Recording Modes | Raw 16-Bit 4.2K (4264 x 2408) up to 59.94p 4:2:2 10-Bit UHD 4K (3840 x 2160) at 23.976p/25p/29.97p/50p/59.94p Full HD (1920 x 1080) at 23.976p/50p/59.94p Full HD (1920 x 1080) at 50i/59.94i 4:2:0 8-Bit UHD 4K (3840 x 2160) at 23.976p/25p/29.97p/50p/59.94p Full HD (1920 x 1080) at 23.976p/50p/59.94p Full HD (1920 x 1080) at 50i/59.94i |
| Recording Limit | Unlimited |
| Video Encoding | NTSC/PAL |
| Audio Recording | Built-In Microphone (Stereo) External Microphone Input |
| Audio File Format | AAC LC, AC3, Dolby Digital 2ch, Linear PCM (Stereo) |
| Live Streaming | Yes |
| Webcam Functionality | Yes |
| Focus Type | Auto and Manual Focus |
| Focus Mode | Continuous-Servo AF (C), Direct Manual Focus (DMF), Manual Focus (M), Single-Servo AF (S) |
| Autofocus Points | Phase Detection: 759 Contrast Detection: 425 |
| Autofocus Sensitivity | -6 to +20 EV |
| Viewfinder Type | Electronic (OLED) |
| Viewfinder Size | 0.64" |
| Viewfinder Resolution | 9,437,184 Dot |
| Viewfinder Eye Point | 25 mm |
| Viewfinder Coverage | 100% |
| Viewfinder Magnification | Approx. 0.9x |
| Diopter Adjustment | -4 to +3 |
| Monitor Size | 3" |
| Monitor Resolution | 1,440,000 Dot |
| Monitor Type | Articulating Touchscreen LCD |
| Built-In Flash | No |
| Flash Modes | Auto, Fill Flash, Hi-Speed Sync, Off, Rear Sync, Red-Eye Reduction, Slow Sync |
| Maximum Sync Speed | 1/250 Second |
| Flash Compensation | -3 to +3 EV (1/3, 1/2 EV Steps) |
| Dedicated Flash System | TTL |
| External Flash Connection | Hot Shoe |
| Memory Card Slot | Dual Slot: CFexpress Type A / SD |
| Connectivity | HDMI A (Full Size), USB Type-C (USB 3.2 Gen 1), USB Micro-B (USB 2.0), 3.5mm Microphone, 3.5mm Headphone |
| Wireless | Wi-Fi Bluetooth |
| GPS | No |
| Operating Temperature | 32 to 104°F / 0 to 40°C |
| Battery | 1 x NP-FZ100 Rechargeable Lithium-Ion, 7.2 VDC, 2280 mAh (Approx. 600 Shots) |
| Dimensions (W x H x D) | 5.07 x 3.81 x 2.74" / 128.9 x 96.9 x 69.7 mm |
| Weight | 1.35 lb / 614 g (Body Only) |
• Sony Alpha a7S III Mirrorless Digital Camera (Body Only)
• Sony NP-FZ100 Rechargeable Lithium-Ion Battery (2280mAh)
• Sony BC-QZ1 Battery Charger
• Sony ALC-B1EM Body Cap for E-Mount Cameras
• USB Type-C to Type-A Cable
• Cable Protector
• Shoulder Strap
• Accessory Shoe Cap
• Eyepiece Cup
• Brand New Factory Fresh Import Model
