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Sony a7R IIIA Mirrorless Camera

Sony a7R IIIA Mirrorless Camera
Key Features
  • 42MP Full-Frame Exmor R BSI CMOS Sensor
  • BIONZ X Image Processor & Front-End LSI
  • 399-Point AF System & 10 fps Shooting
  • UHD 4K30p Video with HLG & S-Log3 Gammas
Proving that speed, resolution, and video capabilities can all coexist, the Sony a7R IIIA is a versatile, high-performance camera characterized by not only its resolution, but by its multimedia versatility.
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Sony A7R III Overview

  • 1Description
  • 2Blending Speed and Resolution
  • 342.4 MP Exmor R BSI CMOS Sensor and BIONZ X Image Processor
  • 4Autofocus and Image Stabilization
  • 5UHD 4K Video Recording in XAVC S Format
  • 6Body Design and Connectivity
By B&H Photo's
Blending Speed and Resolution
Proving that speed, resolution, and video capabilities can all coexist, the Sony a7R IIIA is a versatile, high-performance camera characterized by not only its resolution, but by its multimedia versatility.
42.4 MP Exmor R BSI CMOS Sensor and BIONZ X Image Processor
Featuring a back-illuminated design, the full-frame 42.4-megapixel Exmor R CMOS sensor works with the BIONZ X image processor to offer high-resolution stills and video while minimizing noise and improving speed. This sensor structure works with gapless on-chip lens design and an anti-reflection coating, as well as eliminating the optical low-pass filter, to improve light collection and enhance detail. Also, the copper wiring layer dramatically improves data transmission speed for creating 14-bit, high-resolution 42.4-megapixel stills with a native sensitivity range from ISO 100-32000, which can be further expanded to ISO 50-102400. Also, it enables internal UHD 4K video recording with a wide dynamic range using the full width of the full-frame sensor. The BIONZ X processor also works in conjunction with a high-speed front-end LSI to realize faster processing times along with the ability to capture an impressive 15-stop dynamic range at low sensitivity values.

The sensor and processor combination also avails fast continuous shooting at up to 10 fps at full resolution, for up to 76 consecutive frames, and with full-time AF/AE when working with either a mechanical shutter or an electronic shutter. If shooting in live view mode, a continuous shooting rate of up to 8 fps is also possible.
Autofocus and Image Stabilization
Fast Hybrid AF System
An evolved 4D FOCUS system now employs a combination of 399 phase-detection points, which cover approximately 68% of the frame, along with 425 contrast-detection areas for reliable and quick autofocus and subject tracking performance. This Fast Hybrid AF System now achieves twice the focusing speed and more reliable tracking compared to previous a7R models, as well as improved low-light focusing response down to -3 EV.
  • Lock-on AF maintains focus on moving subjects throughout the use of a configurable frame that is set over the desired moving subject
  • Expand Flexible Spot employs neighboring focus points to retain focus on moving subjects even if the originally selected point loses focus
  • Eye AF can be used to base focus on recognized human subjects' eyes for portraits and is available in both AF-S and AF-C modes, for both stills and video. Eye AF can be used when photographing animal subjects, too, with any focusing mode when shooting stills
  • Focus Magnifier function can be used for critical focus when homing in on minute subject details
  • Rear touchscreen can also be used for Touch Focus control, and a Touchpad Focus Control mode lets you use the rear screen intuitively while keeping your eye to the viewfinder
  • For more personalized control over focus, and benefitting working in either vertical or horizontal shooting orientation, the AF area can be switched in orientation to better suit your subject matter
  • AF tracking sensitivity can also be customized in five steps to match how a subject is moving
  • Frequently used focus point settings can be memorized and recalled with a custom button for faster switching between focus settings
5-Axis SteadyShot INSIDE Image Stabilization
The a7R IIIA incorporates an enhanced 5.5-stop effective 5-axis SteadyShot INSIDE image stabilization system, which compensates for five different types of camera shake encountered during handheld shooting of stills and video. This allows users to confidently use any lens, even adapted lenses, for critical imaging without encountering blur from camera shake.

For long focal lengths, the system will correct for pitch and yaw adjustments. Macro and high-magnification imagery, on the other hand, will benefit from the inclusion of horizontal and vertical shift compensation. All shooting styles will get usage out of the roll compensation. All 5 axes of stabilization will function at all times, even when used with third-party lenses and adapters or lenses with built-in optical stabilization.
UHD 4K Video Recording in XAVC S Format
  • Internal recording of UHD 4K video is possible in multiple frame rates up to 30 fps using the full width of the sensor with 8-bit 4:2:0 color sampling using the 100Mbps XAVC S codec.
  • Oversampled 4K recording is also possible, which uses a 5K capture area with a Super 35 crop for greater detail. This full pixel readout is void of pixel binning for higher quality imagery with reduced moiré and aliasing.
  • Full HD 1080p recording is also supported in frame rates up to 120 fps. The high-speed, 120 fps recording also enables 4x and 5x Slow& Quick Motion (S&Q) movie recording with the frame rate set to either 30p or 24p.
  • In addition to high-resolution internal recording, uncompressed HDMI output also enables the use of an optional external recorder for clean 4K recording with 4:2:2 sampling.
  • 4K video recording also avails the ability to produce 8MP stills during playback by taking a frame grab from a movie and storing it as a separate file.
S-Log3 and HLG Color Control
  • HLG (Hybrid Log-Gamma) support permits recording within a wide color gamut for producing HDR-ready content directly from the camera.
  • S-Log3 is also available for producing a 14+-stop dynamic range with increased grading control in the shadow to mid-tone regions of the image.
Body Design and Connectivity
Viewfinder and LCD Screen
  • An updated Quad-VGA OLED Tru-Finder EVF is featured and has a 3.69m-dot resolution for bright, clear viewing in high detail. Both Standard and High-quality settings can be used, depending on the shooting situation, in order to optimize the viewing experience.
  • In addition to the EVF, a 3.0" 2.36m-dot rear LCD is also available, which has a touch panel design for intuitive operation and focusing control. The screen also tilts upward 107° and downward 41° to benefit working from high and low angles.
Reliable Construction
  • Magnesium alloy chassis assures rigidity, durability, and stability while remaining lightweight. The lens mount has also been improved to better support heavy lenses and the grip rigidity has been improved for more comfortable handholding.
  • A durable shutter unit incorporates a coreless motor and brake system that reduces vibrations to better control shutter shock as well as extend its rated lifespan to approximately 500,000 actuations.
  • Weather-sealing has been employed to resist dust and moisture for reliable operation in harsh weather conditions.
  • Using the same NP-FZ100 battery as the a9, the a7R IIIA has improved battery life and is now rated for approximately 530 shots per charge with the EVF or 640 shots with the rear LCD.
  • Dual SD memory card slots allow for flexible file saving and handling and can be configured to partition raw and JPEG files or can be used for overflow recording. One of the card slots is rated to support UHS-II memory cards.
  • Integrated PC sync terminal for wired flash sync with strobe packs or wireless radio remotes.
  • A USB 3.2 Gen 1 Type-C port has been added, in addition to a micro-USB port, for faster, more reliable tethering support. The USB Type-C connection allows the camera to be charged from the host power source while connected.
  • The a7R IIIA features a 3.5mm microphone input jack for compatibility with external microphones. And for users needing more, the camera is also compatible with the Sony XLR-K2M XLR Adapter for recording professional balanced XLR audio signals with phantom power and adjustable mic/line inputs. For monitoring audio, a 3.5mm headphone jack is available as well as real time audio levels for a visual reference.
  • Built-in Wi-Fi enables the a7R IIIA to instantly share imagery to mobile devices for direct sharing online to social networking, via email, and to cloud storage sites. NFC (Near Field Communication) is also supported, which allows for one-touch connection between the camera and compatible mobile devices; no complex set-up is required. Once connected, the linked mobile device can also display a live view image on its screen and remotely control the camera's shutter.
  • Bluetooth connectivity allows for location data acquisition.
Pixel Shift Multi Shooting
This unique compositing mode allows you to achieve even greater resolution than the 42.4MP sensor affords. Working in conjunction with the sensor-shift image stabilization, this mode shifts the sensor while making four consecutive exposures in order to acquire approximately 169.6MP of information for greater color accuracy and detail than possible with a single exposure. These files can then be merged together during post-production by using the Sony Imaging software suite.

Sony A7R III Specs

Lens MountSony E
Sensor ResolutionActual: 43.6 Megapixel
Effective: 42.4 Megapixel (7952 x 5304)
Sensor Type35.9 x 24 mm (Full-Frame) CMOS
Image StabilizationSensor-Shift, 5-Axis
Built-In ND FilterNone
Capture TypeStills & Video
Exposure Control
Shutter TypeElectronic Shutter
Shutter Speed1/8000 to 30 Seconds
1/8000 to 1/4 Second in Movie Mode
Bulb/Time ModeBulb Mode
ISO SensitivityPhoto
100 to 32,000 (Extended: 50 to 102,400)
100 to 32,000
Metering MethodCenter-Weighted Average, Highlight Weighted, Multi-Zone, Spot
Exposure ModesAperture Priority, Auto, Manual, Program, Shutter Priority
Exposure Compensation-5 to +5 EV (1/3, 1/2 EV Steps)
Metering Range-3 to 20 EV
White BalancePresets: Auto, Cloudy, Color Temperature, Custom, Daylight, Flash, Fluorescent (Cool White), Fluorescent (Daylight), Fluorescent (Warm White), Incandescent, Shade, Underwater
Continuous ShootingUp to 10 fps at 42.4 MP for up to 76 Frames (Raw) / 76 Frames (JPEG)
Up to 8 fps at 42.4 MP for up to 76 Frames (Raw) / 76 Frames (JPEG)
Up to 6 fps at 42.4 MP for up to 76 Frames (Raw) / 76 Frames (JPEG)
Up to 3 fps at 42.4 MP for up to 76 Frames (Raw) / 76 Frames (JPEG)
Self-Timer2/5/10-Second Delay
Still Image Capture
Image Sizes3:2 Raw
7952 x 5304
16:9 Raw
7952 x 4472
3:2 JPEG
7952 x 5304
5168 x 3448
3984 x 2656
16:9 JPEG
7952 x 4472
5168 x 2912
3984 x 2240
Aspect Ratio3:2, 16:9
Image File FormatJPEG, Raw
Bit Depth14-Bit
Internal Recording ModesXAVC S
UHD 4K (3840 x 2160) at 23.98/25/29.97 fps [60 to 100 Mb/s]
1920 x 1080p at 23.98/25/29.97/50/59.94/100/119.88 fps [100 Mb/s]
1280 x 720 at 100/119.88 fps [50 Mb/s]
1920 x 1080p at 23.98/25/50/59.94 fps [17 to 28 Mb/s]
1920 x 1080i at 50/59.94 fps [17 to 24 Mb/s]
1920 x 1080p at 25/29.97/50/59.94 fps [16 to 28 Mb/s]
1280 x 720 at 25/29.97 fps [6 Mb/s]
External Recording Modes4:2:2 8-Bit via HDMI
UHD 4K (3840 x 2160) at 23.98/24.00/25/29.97 fps
1920 x 1080p at 23.98/24.00/50/59.94 fps
1920 x 1080i at 50/59.94 fps
Gamma CurveHDR-HLG, Sony S-Log 2, Sony S-Log 3
Recording LimitUp to 30 Minutes
Broadcast OutputNTSC/PAL
IP StreamingNone
Built-In Microphone TypeStereo
Audio RecordingAVCHD: 2-Channel AC-3 Audio
XAVC S: 2-Channel LPCM Audio
Media/Memory Card SlotSlot 1: SD/SDHC/SDXC (UHS-II)
Slot 2: SD/SDHC/SDXC/Memory Stick Duo Hybrid (UHS-I)
Video I/O1 x Micro-HDMI Output
Audio I/O1 x 1/8" / 3.5 mm TRS Stereo Headphone Output
1 x 1/8" / 3.5 mm TRS Stereo Microphone Input
Power I/O1 x USB-C Input/Output
Other I/O1 x Sony Multi/Micro-USB Input/Output (Shared with Remote Input)
1 x USB-C (USB 3.2 / 3.1 Gen 1) Input/Output (Shared with Power Input)
1 x PC Sync Socket Output
WirelessWi-Fi, Bluetooth
Global Positioning (GPS, GLONASS, etc.)None
Resolution2,359,296 Dot
Display TypeTilting Touchscreen LCD
TypeBuilt-In Electronic
Resolution3,686,400 Dot
Eye Point23 mm
MagnificationApprox. 0.78x
Diopter Adjustment-4 to +3
Focus TypeAuto and Manual Focus
Focus ModeAutomatic, Continuous-Servo AF, Direct Manual Focus, Manual Focus, Single-Servo AF
Autofocus PointsPhase Detection: 399
Contrast Detection: 425
Autofocus Sensitivity-2 to +20 EV
Built-In FlashNo
Flash ModesAuto, Fill Flash, Hi-Speed Sync, Off, Rear Sync, Red-Eye Reduction, Slow Sync, Wireless
Maximum Sync Speed1/250 Second
Flash Compensation-3 to +3 EV (1/3, 1/2 EV Steps)
Dedicated Flash SystemTTL
External Flash ConnectionIntelligent Hot Shoe, PC Terminal
Operating Temperature32 to 104°F / 0 to 40°C
Battery Type1 x NP-FZ100 Rechargeable Lithium-Ion, 7.2 VDC, 2280 mAh (Approx. 530 Shots)
Tripod Mounting Thread1 x 1/4"-20 Female (Bottom)
Accessory Mount1 x Hot Shoe Mount
Material of ConstructionMagnesium Alloy
Dimensions (W x H x D)5 x 3.76 x 2.9" / 126.9 x 95.6 x 73.7 mm
Weight1.45 lb / 657 g
Packaging Info
Package Weight3.005 lb
Box Dimensions (LxWxH)9.6 x 6.1 x 5.7"

Sony A7R III Reviews

Great camera

By Dr. John A.
Rated 5 out of 5
Date: 2022-11-18

Great camera.

Great upgrade from Sony A7Rii

By Brian
Rated 5 out of 5
Date: 2022-07-28

I've been using the A7rii for the past 4-5 years and while it makes excellent images it certainly has its drawbacks. The main problem is that the focus system is slow and relatively inaccurate. I purchased an A7IV for my daughter as a graduation present from college (BA Journalism) and it really exposed how much I was missing with the R2. I rented an Riiia and while not quite as good as the A7IV, it is a dramatic improvement. I'm glad as my photography is primarily landscapes, portraits and street scenes and I really like having 42mp for the large size prints I make. I've found the colors a better in the a7riii as well as it seems to handle higher iso better too. I realize the a7riii is close to 5 years old, but it is really an excellent camera-not that far off of current 2022 versions. Needless to say, the image quality of the riii is impeccable and has been a pleasure to use.

Great camera

By Sean
Rated 5 out of 5
Date: 2022-07-26

Great camera. Based on what I enjoy shooting the emphasis on resolution with this model is really why I gravitated to the a7R. I also love the ability to customize all the buttons based on the features I need to get to quickly.

good item with right price

Rated 5 out of 5
Date: 2022-07-20


Great Upgrade from A7RII

By Brian
Rated 5 out of 5
Date: 2022-07-15

5 years ago I bought the Sony A7rII and have been using it since then. While it produced great images, the focus system was very poor. It was very easy to be me frustrated with that camera. I finally bit the bullet and upgraded to the A7Riiia when it was on sale and have been really impressed. My daughter has the 7IV and that focus system is excellent, but the a7RiiiA isn't too far behind. The image quality is superb, and the features and buttons make this very easy to use. The eye af for humans and animals works well and makes portrait photography much easier. Clearly this camera excels at landscape photography. It's light, IQ is high and it's easy to always have with you on a hike. I'm happy with this camera for my semi pro and personal needs.

how many mileage have ?

By Mari
Rated 5 out of 5
Date: 2022-07-11

how many mileage have this camera?

Probably the best in the line

By Argun
Rated 5 out of 5
Date: 2022-11-04

I should start this review by saying that I purchased this camera on the day the A7rV was announced. I have been waiting to upgrade my aging A7ii for a while, and watching the new models with disappointment after disappointment. Either due to reported problems or more and more added useless (to me) features. After much consideration, I have decided that this camera provides the best bang for the money if you are a stills photographer with no need to autofocus on a passing bee when trying to photograph an oncoming bullet train; or otherwise need the camera be smarter than you. The pros: - great price point in light of the pricing structure of the newer models - 42 Mpix is a sweet spot - no flippy screen - no missing features for basic camera operations - good enough weather resistance for regular climates The cons: - I do wish both slots were UHS-II - new models have slightly better grip ergonomics - no complaints but I wonder if the new EVFs would have made a difference

Great camera, awesome pictures!

By Thibaut
Rated 5 out of 5
Date: 2022-11-04

The pictures quality is awesome! Even in low light at high ISO. The only complaint I would have is the build. It sometimes feels small or weak in the hand. For example the LCD, I'm scared I could break it. Feels so thin...

See any errors on this page? Let us know


I bought one a7R3 from B&H couple years back. I ...

I bought one a7R3 from B&H couple years back. I always use the Movie mode (AF-C and Wide area) to record video. I did not have any issue until I recorded a falls recently. The issue is the AF-C kept hunting the Focus point due to the wind blow to trees and the moving of the falling water stream so my clip has 'breathing effect'. The 'breathing effect' can be avoided / eliminated by using AF-S and Flexible Spot Focus. I have another camera brand which offers more than AF-C and MF modes in the Movie mode. Do you know why Sony just allows AF-C and MF and disables the others? Thank you very much.
Asked by: George
For most video purposes people want to either track an object or do similar work like you've described of recording a landscape scene. Since you can recreate AF-S with manual focus (focusing on a single point and having it not change) they've eliminated that option. DMF is Direct Manual Focus which is autofocus with manual override which doesn't make any sense to use since you have the other options.
Answered by: Ryan
Date published: 2021-08-29

Can anyone with an a7r IIIa verify if one or both ...

Can anyone with an a7r IIIa verify if one or both of the sd card slots are UHS-II? The Sony web site says they are, but B&H says only one is.
Asked by: Dayle
The Sony Alpha a7R IIIA Mirrorless Digital Camera (Body Only) has one slot that supports a UHS-II SD memory card and one slot that supports a UHS-I SD memory card.
Answered by: Marisa
Date published: 2021-09-05

Could you tell me the difference between an A7R ...

Could you tell me the difference between an A7R iii & and A7R iiiA? Thank you
Asked by: Jake
The major difference in the two cameras is the LCD screen. The A7RIIIa has a 2.36m-Dot screen as the old one had a 1.44m dot screen.
Answered by: Stephen
Date published: 2022-01-30

What level of autofocus will I have with a Sigma ...

What level of autofocus will I have with a Sigma 150-600 EF mount using the MC 11 converter. Also, what if I add on the Sigma 1401 TC? Should I just buy the Sigma 150-600 E mount for mirrorless? Lots here. Thanks for any thoughts
Asked by: Mike
From our experience (testing in the store and from many of our own team using this combination in the field), we have had excellent results using both the Sigma 150-600 Contemporary and Sport with the MC-11! Using the 1.4x TC did not cause much of loss of speed or reliability EXCEPT that at 600mm the minimum aperture was f/9 and we were not able to autofocus at all, but only with the TC. The lens was able to focus past f/9 without the tele-converter.
Answered by: Jeremy
Date published: 2022-04-09

what's the difference sony a7r iii or sony a7r ...

what's the difference sony a7r iii or sony a7r iiiA betwen?
Asked by: Mari
In terms of performance, the A7R III and A7R III A would be the same. The A7R III A would just improve upon the original A7R III in terms of its LCD resolution and faster USB 3.2 port.
Answered by: Kirk
Date published: 2022-03-07

How can I compare this camera with the Alpha a7 ...

How can I compare this camera with the Alpha a7 IV?
Asked by: Sam
We have the compare feature on our site. You can select both the Sony a7R IIIA Mirrorless Camera and the Sony a7 IV Mirrorless Camera. Linked here is the page showing the specification comparison between the two.
Answered by: Yaakov
Date published: 2021-12-14

Does sonya7riiia has touchscreen?

Does sonya7riiia has touchscreen?
Asked by: Sonu
Yes, the Sony A7RIIIA has 3.0" tilting touchscreen.
Answered by: James P
Date published: 2022-07-03

Does this camera also have compressed RAW?

Does this camera also have compressed RAW?
Asked by: larry
What is the file size of the compressed RAW
Answered by: larry
Date published: 2021-10-17
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