Sony a7R IIIA Mirrorless Camera
The Sony a7R IIIA is a 42.4MP full-frame mirrorless camera — with 4K video and in-body stabilization. Check GearFocus for current availability, with buyer protection on every purchase.
Sony a7R IIIA Mirrorless Camera
Get notified when one lists.
We'll text or email you the moment a Sony a7R IIIA is listed on GearFocus.
Have a Sony a7R IIIA sitting in your bag?
You'd be the first listing for this model.
Serious buyers are already watching — list yours in minutes.
Available Now on GearFocus
Camera Overview — Sony a7R IIIA
Key Features — Sony a7R IIIA
42.4MP Full-Frame Sensor: Delivers a maximum output of 7952x5304 pixels, suitable for large-format prints, heavy cropping, and high-resolution commercial work.
5-Axis In-Body Stabilization: Compensates for camera shake across five axes, allowing sharper handheld shooting without depending on lens-based stabilization.
399-Point Hybrid AF: Combines phase-detection and contrast-detection across 399 focus points for fast, reliable acquisition across the frame.
Eye, Face & Animal Detection: Automatically detects and tracks human eyes, faces, and animals, keeping subjects sharp even as they move through the frame.
10fps Continuous Shooting: Sustained burst shooting at up to 10 frames per second at full resolution for capturing fast-moving subjects.
4K Video with S-Log Profiles: Records 4K at up to 30fps with S-Log2, S-Log3, and HLG color profiles, providing meaningful dynamic range for color grading workflows.
Camera Specifications — Sony a7R IIIA
| Spec | Detail |
|---|---|
| Use Cases | Portrait, Landscape, Travel, Studio, Product, Architecture, Event, Headshot |
| Type | Mirrorless |
| Sensor | Full Frame (35mm) |
| Resolution | 42.4MP |
| Processor | BIONZ X |
| ISO Range | 100 – 32000 |
| AF System | Hybrid (Phase + Contrast), Eye Detection AF, Face Detection AF, Animal Detection AF |
| AF Points | 399 |
| Max Photo Resolution | 7952x5304 |
| Burst Rate | 10 fps |
| Max Video Resolution | 4K |
| Max Frame Rate | 30fps |
Description — Sony a7R IIIA
The Sony a7R IIIA is a full-frame mirrorless camera centered on a 42.4MP sensor processed by Sony's BIONZ X engine, producing images at up to 7952x5304 pixels. Its ISO range spans 100 to 32000, and the 399-point hybrid autofocus system — covering phase-detection and contrast-detection — supports Eye Detection AF, Face Detection AF, Animal Detection AF, and subject tracking. Burst shooting reaches 10fps.
Video recording goes up to 4K at 30fps with frame rate options of 24fps and 30fps, 8-bit color depth, and S-Log2, S-Log3, and HLG color profiles available. 5-axis in-body stabilization is built into the body with no digital IS. The 3686k-dot electronic viewfinder runs at 120Hz, and the 3.0-inch LCD offers 1440k dots of resolution. Connectivity covers Wi-Fi, Bluetooth, USB-C, Micro HDMI, and both 3.5mm headphone and microphone jacks.
The magnesium alloy, weather-sealed body measures 126.9 x 95.6 x 73.7 mm and weighs 657g. The NP-FZ100 battery is rated at 650 shots per charge.
Pros — Sony a7R IIIA
- ✓42.4MP full-frame sensor with maximum image output of 7952x5304 pixels suits high-resolution and large-format work
- ✓399-point hybrid autofocus system with Eye, Face, and Animal Detection AF enables reliable subject tracking across a variety of scenarios
- ✓10fps continuous burst rate supports fast-moving subject coverage at full resolution
Cons — Sony a7R IIIA
- ✗Video is capped at 8-bit color depth, which limits flexibility compared to cameras offering 10-bit internal recording
- ✗4K frame rates are limited to 24fps and 30fps with no higher frame rate option listed in specifications
- ✗The Micro HDMI output is more fragile and less universally compatible than full-size HDMI ports
Reviews — Sony a7R IIIA
Videos — Sony a7R IIIA
SONY a7R IV vs SONY a7R III Which Camera SHOULD You BUY? — Jared Polin
Frequently Asked Questions — Sony a7R IIIA
What lens mount does the Sony a7R IIIA use?+
The Sony a7R IIIA uses the Sony E lens mount. This is confirmed in the mount specifications under the lens field.
Does the a7R IIIA have in-body image stabilization?+
Yes, the camera features 5-axis in-body image stabilization. Digital IS is not active, meaning stabilization is handled mechanically in-body.
What video color profiles are available on the a7R IIIA?+
The camera supports S-Log2, S-Log3, and HLG color profiles for video, as listed in the videoSpecs. These provide options for log-based and HDR workflows.
What memory cards does the Sony a7R IIIA accept?+
The a7R IIIA accepts SDXC, SDHC, and Memory Stick PRO Duo cards. The specifications do not indicate a dual card slot configuration.
What is the battery life of the a7R IIIA?+
The camera uses an NP-FZ100 battery with a rated life of 650 shots per charge, according to the battery specifications.
Is the Sony a7R IIIA weather sealed?+
Yes, the body design specifications confirm the a7R IIIA is weather sealed and constructed from magnesium alloy, offering durability in challenging environments.