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Sony a7 IV vs a7R III Comparison

Storage & Battery

Sony a7 IV

Sony a7 iv camera image

Sony a7R III

Sony a7R III camera image
Sony a7 IV
Sony a7R III
a7 IV
Refers to the year this camera was officially made available for sale.
Announcement Date
Refers to the date the manufacturer publicly announced the upcoming release and general specs of this camera.
October 21, 2021
October 25, 2017
Camera Type
Camera Size
Camera Weight

The Sony a7 IV outperforms the Sony a7R III by a slim margin, scoring 84/100 compared to the a7R III’s 83/100. Both cameras are mirrorless and share similar dimensions, with the a7 IV measuring 131 x 96 x 80mm and the a7R III at 127 x 96 x 74mm. They also have almost identical weight—659g for the a7 IV and 657g for the a7R III.

The a7 IV’s higher score is due to its more recent release in 2021, compared to the a7R III’s 2017 release. Additionally, the a7 IV has a lower launch price of $2499, making it more cost-effective than the a7R III, which debuted at $3200.

The a7R III, however, is slightly more compact and lighter than the a7 IV, making it a bit more portable. Despite the minor differences, both cameras offer excellent performance and quality. The choice between them ultimately depends on individual preferences for pricing and portability.

Sony a7 IV vs a7R III Overview and Optics

The Sony a7 IV wins the optics comparison with a score of 85/100, while the Sony a7R III follows closely with a score of 84/100. Both cameras share several specifications, such as a 10 fps shooting speed, CMOS sensor type, full-frame sensor size, Sony FE lens mount, and image stabilization.

The a7 IV has a 33-megapixel sensor and a Bionz XR processor, which contributes to its higher optics score. Additionally, it has a DXOMARK sensor score of 97, which is slightly lower than the a7R III but still impressive. With these features, the a7 IV provides excellent image quality, faster processing, and better overall performance.

On the other hand, the a7R III has a higher 42.4-megapixel sensor and a DXOMARK sensor score of 100, which means it can capture more detail in images. However, its Bionz X processor is not as advanced as the a7 IV’s Bionz XR, which may affect the camera’s overall performance and speed.

While the a7 IV wins the optics comparison, the a7R III’s higher megapixel count and DXOMARK sensor score make it a strong competitor, especially for photographers who prioritize capturing intricate details in their images. Nevertheless, the a7 IV’s superior processor and overall performance give it a slight edge in the optics department.

In the end, the choice between the Sony a7 IV and the Sony a7R III will depend on the individual photographer’s priorities. If you value speed, processing power, and overall performance, the a7 IV is the better option. However, if capturing detailed images is your top priority, the a7R III may be the more suitable choice.

The higher the number of megapixels, the more detail the cameras sensor can capture.
33 MP
42.4 MP
Image Resolution
Image resolution is measured in pixels and megapixels, width by height. The higher the number, the higher its resolution.
7008 x 4672 px
7952 x 5304 px
Sensor Type
The camera sensor captures light and records the image. Sensors vary in physical size, the number of pixels, and quality.
Sensor Size
The sensor size contributes to the overall quality as well as the dynamic and tonal range a camera can capture. As a rule of thumb, the more surface there is to read the light, the more information it will capture.
23.8 x 35.6 mm
24 x 35.9 mm
Sensor Format
Refers to the most commonly used sensor sizes.
Full Frame
Full Frame
Frame Rate
The number of sequential frames per second the camera can write to the memory card when shooting in burst or continuous mode.
10 fps
10 fps
Lens Mount
The lens mount will tell you what type of lens range you can fit onto the camera body. Often the same camera company will have different lens ranges for different cameras.
Sony E
Sony FE
Image Processor
The image processor in the camera converts the information collected on the sensor for digital storage on the memory card.
Bionz XR
Bionz X
Aspect Ratio
The aspect ratio refers to the proportional difference between width and height. The most popular aspect ratios are 3:2 and 4:3.
Minimum ISO (Native)
Refers to the lowest native (or 'base') ISO setting. Lower ISO are less sensitive to light but make a cleaner image.
Maximum ISO (Native)
Refers to the highest native (or 'base') ISO setting. Higher ISO is necessary for low-light situations or night photography, but higher ISOs often introduce grain or noise.
Minimum ISO (Expanded)
Expanded (or extended) ISO is a digitally enhanced feature available on some cameras. It allows you to push beyond the native ISO range if necessary.
Maximum ISO (Expanded)
Expanded (or extended) ISO is a digitally enhanced feature available on some cameras. It allows you to push beyond the native ISO range if necessary.
Minimum Shutter Speed
The minimum shutter speed will tell you the longest exposure your camera can take without using an external accessory.
30 s
30 s
Maximum Shutter Speed
The maximum shutter speed tells you the length inside 1 second the camera will capture. These can sometimes be extended with accessories such as extra external batteries.
1/ 8000 s
1/ 8000 s
Autofocus Points
Autofocus points show where the camera is focusing graphically as squares or brackets in Live View or on an electronic viewfinder. These points are also used for light meter readings.
In-body Stabilization
In-body Stabilization means the camera has a certain technology embedded that counteracts camera shake.
Viewfinder Type
The viewfinder type is either electronic or optical. Electronic viewfinders will have a small screen in the viewfinder. Optical viewfinders will use prisms and mirrors to look through the lens.
Viewfinder Resolution
3,686,400 dots
3,686,400 dots

Sony a7 IV vs a7R III Video Performance

The Sony a7 IV emerges as the superior camera for video capabilities with a score of 91/100, significantly outperforming the Sony a7R III, which scores 56/100. Both cameras share some common specifications, including a maximum video resolution of 4K and maximum video dimensions of 3840 x 2160.

The Sony a7 IV excels in video performance due to its higher maximum video frame rate of 120fps, allowing for smoother slow-motion footage and increased creative flexibility. Additionally, the a7 IV has built-in time-lapse functionality, enabling users to create stunning time-lapse sequences without the need for external software or hardware.

While the Sony a7R III also offers 4K video resolution and the same maximum video dimensions, its maximum video frame rate is limited to 30fps. This lower frame rate restricts the camera’s ability to capture smooth slow-motion footage compared to the a7 IV. Furthermore, the a7R III lacks built-in time-lapse functionality, requiring users to rely on external tools or software to create time-lapse sequences.

Despite these shortcomings, the Sony a7R III still delivers high-quality 4K video footage, making it a viable option for those who do not require advanced video features such as high frame rates and built-in time-lapse functionality.

To conclude, the Sony a7 IV offers superior video capabilities, demonstrated by its higher video score, faster maximum video frame rate, and built-in time-lapse functionality. The Sony a7R III, while lacking advanced features, remains suitable for users who prioritize image quality and do not require the additional video capabilities provided by the a7 IV.

Indicates if this camera is capable of recording video.
Max Video Resolution
The best resolution this camera can capture video in. Modern cameras can capture up to 8K video.
Max Video Dimensions
Video resolution measured by the greatest number of pixels possible in each frame, width by height. A higher resolution means more detail or clarity in your video.
3840 x 2160 px
3840 x 2160 px
Max Video Frame Rate
How many frames per second your video will capture. Most cameras have options for multiple frame rates, depending on the resolution you shoot in. For a general video, 24p or 30p is the standard, but more serious filmmakers may need a higher frame rate for creative effect.
120 p
30 p
Time-Lapse Built In
A built in time-lapse mode will allow continuous shooting throughout a prolonged period of time to be compressed into a sped up video.
Video File Format
Different cameras can record in various video file formats. The File format you record in can impact how you edit and use the files.
MPEG-4, XAVC S, XAVC HS, XAVC S-I, H.264, H.265
XAVC S, AVCHD Ver. 2.0, MP4

Sony a7 IV vs a7R III Features and Benefits

The Sony a7 IV and Sony a7R III both have a feature score of 83/100, making them equally competitive in terms of features. These cameras share many specifications, including a 3-inch touchscreen, flip screen, Wi-Fi, and Bluetooth capabilities. Neither camera has GPS functionality.

Despite having the same feature score, the Sony a7 IV has a lower screen resolution of 1,040,000 dots compared to the a7R III’s 1,440,000 dots. This means that the a7R III provides a sharper, more detailed display for users. However, this advantage may not be significant for some photographers, as both cameras still offer high-quality displays.

On the other hand, the Sony a7 IV excels in other aspects that may not be reflected in the feature score. It is essential to consider these factors when choosing between the two cameras. Some users may prioritize other specifications or performance aspects over the screen resolution difference.

In comparing the Sony a7 IV and Sony a7R III, it is clear that both cameras offer impressive features and capabilities. The choice between the two ultimately depends on individual preferences and priorities. While the a7R III has a higher screen resolution, the a7 IV may still be a better fit for some photographers, based on other factors not mentioned in this comparison. It is crucial for potential buyers to research and consider all aspects of each camera before making a decision.

Built-in Flash
A built-in flash will often be positioned right above the lens. This will automatically pop up when you activate it.
External Flash
External flashes are often connected through a hot shoe at the top of a camera, or a cable at the side of the camera.
GPS features in a camera will include location metadata to each of your photographs.
Weather Sealing
Weather sealing capabilities will give you more confidence when shooting in unfavourable conditions.
Screen Type
Touch Screen
Touchscreen allows you to change camera settings and access menus with a swipe of your finger, instead of using buttons.
Screen Size
Screen Resolution
Screen dots indicate the resolution of the LCD screen by including each sub pixel.
1,040,000 dots
1,440,000 dots
Flip Screen
A flip screen (or articulating screen) is a second screen which can flip out from the side or top of the camera. This rotating screen allows you more freedom to take photos at different angles.
Live View
Live View feature allows you to see a continuous live video of what is being seen through your lens.
Bluetooth capabilities allow you wireless control of your camera with other external devices.

Sony a7 IV vs a7R III Storage and Battery

The Sony a7 IV outperforms the Sony a7R III in storage and battery with a score of 76/100 compared to 65/100. Both cameras share common specifications, such as two memory card slots, compatibility with UHS-II cards, and the NP-FZ100 battery type.

The a7 IV excels with its support for CFexpress Type A cards, providing faster read and write speeds, and USB charging capability, offering convenient charging options. These advantages make the a7 IV more versatile and user-friendly for photographers and videographers.

On the other hand, the a7R III boasts a slightly longer battery life, reaching 650 shots versus the a7 IV’s 580 shots. This advantage may appeal to those who prioritize longer shooting sessions without the need for frequent battery replacements.

Taking these factors into account, the Sony a7 IV emerges as the superior option in terms of storage and battery, providing enhanced memory card compatibility and charging options. The Sony a7R III’s advantage in battery life may be appealing to some users, but it does not outweigh the benefits offered by the a7 IV.

Storage and Battery
Storage and Battery
Memory Card
CFexpress Type A, SD (UHS-II compatible)
SD / SDHC / SDXC (UHS-II compatible)
Dual Memory Card Slots
Battery Type
Battery Life
Approximately how long this cameras battery will last measured by how many photographs you will be able to take.
580 shots
650 shots
USB Charging
Sensor scores tested by DXOMARK
Overall Score
DXOMARK overall sensor score.
Portrait (Color Depth)
As described by DXOMARK 'The Portrait score in our camera sensor reviews defines color depth performance and its unit is a number of bits. A color depth of 22 bits is excellent; differences below 1 bit are barely noticeable.'
25.4 bits
26 bits
Landscape (Dynamic Range)
As described by DXOMARK 'The Landscape score in our camera sensor tests defines the maximum dynamic range of the camera sensor and its unit is an exposure value (EV). A value of 12 EV is excellent with differences below 0.5 EV usually not noticeable.'
14.7 EVs
14.7 EVs
Sports (Low-Light ISO)
Described by DXOMARK as 'The maximal value of ISO sensitivity needed to reach a given value of Signal-to-Noise Ratio (SNR). The greater the value, the better'

Sony a7 IV vs a7R III Alternatives

User Scores
B&H photo video
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