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Canon EOS R8 vs Sony a7 III Comparison

Storage & Battery

Canon EOS R8

Canon EOS R8 camera image

Sony a7 III

Sony A7 III camera
Canon EOS R8
Sony a7 III
a7 III
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.
February 08, 2023
February 27, 2018
Camera Type
Camera Size
Camera Weight

The Sony a7 III outperforms the Canon EOS R8 with a score of 81 compared to 76/100. Both cameras are mirrorless and were released in different years, with the Sony a7 III launching in 2018 and the Canon EOS R8 in 2023. They share similarities in size, but the Canon EOS R8 is lighter at 461g, whereas the Sony a7 III weighs 650g.

The Canon EOS R8 is a more affordable option with a launch price of $1499, making it attractive for budget-conscious photographers. However, the Sony a7 III’s higher score shows that it delivers better performance and features despite its higher launch price of $2000.

While the Sony a7 III is the winner in terms of performance, the Canon EOS R8 has its advantages in weight and affordability. Ultimately, choosing between these cameras depends on individual preferences and priorities.

Canon EOS R8 vs Sony a7 III Overview and Optics

The Sony a7 III outperforms the Canon EOS R8 in optics with a score of 81/100 compared to the Canon’s 77/100. Both cameras have 24 and 24.2 megapixels, respectively, and share similar specifications such as CMOS sensors, full-frame sensor sizes, and lens mounts – Canon RF for the EOS R8 and Sony FE for the a7 III.

The Sony a7 III excels with its Bionz X processor and a DXOMARK sensor score of 96, which contributes to its higher optics score. This camera also offers image stabilization, a feature that the Canon EOS R8 lacks. These advantages make the Sony a7 III a more suitable choice for photographers seeking superior image quality and stability.

On the other hand, the Canon EOS R8 boasts a faster shooting speed of 40 compared to the Sony a7 III’s 10. Its Digic X processor, while not as highly rated as the Bionz X, still delivers reliable performance. Even with a lower DXOMARK sensor score of 94, the Canon EOS R8’s faster shooting speed may be more appealing to photographers who prioritize capturing fast-moving subjects.

To sum up, the Sony a7 III takes the lead in optics with its higher score, superior processor, and image stabilization feature. However, the Canon EOS R8 holds its ground with a faster shooting speed, making it a viable option for those who prioritize capturing action shots. Ultimately, the choice between these two cameras will depend on the individual photographer’s needs and preferences.

The higher the number of megapixels, the more detail the cameras sensor can capture.
24 MP
24.2 MP
Image Resolution
Image resolution is measured in pixels and megapixels, width by height. The higher the number, the higher its resolution.
6000 x 4000 px
6000 x 4000 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.
36 x 24 mm
23.8 x 35.6 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.
40 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.
Canon RF
Sony FE
Image Processor
The image processor in the camera converts the information collected on the sensor for digital storage on the memory card.
Digic X
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/ 4000 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
2,360,000 dots
2,359,296 dots

Canon EOS R8 vs Sony a7 III Video Performance

The Canon EOS R8 outperforms the Sony a7 III in video capabilities with a score of 91/100 compared to the Sony’s 70. Both cameras share some common specifications, such as a maximum video resolution of 4K and maximum video dimensions of 3840 x 2160. However, the differences in their video capabilities are evident in their scores.

The Canon EOS R8’s superiority is apparent in its higher maximum video frame rate of 180fps, compared to the Sony a7 III’s 30fps. This means that the Canon EOS R8 can capture smoother and more detailed slow-motion footage than the Sony a7 III.

The Canon EOS R8’s higher video score is a result of its superior video capabilities, such as the higher maximum video frame rate and built-in time-lapse functionality. These features make it a better choice for those who prioritize video performance.

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.
180 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.
MP4, H.264, H.265

Canon EOS R8 vs Sony a7 III Features and Benefits

The Canon EOS R8 wins the features comparison with a score of 85/100, while the Sony a7 III scores 81/100. Both cameras share several similarities, including a 3-inch screen size, touchscreen capabilities, flip screen, lack of GPS, and the presence of WIFI and Bluetooth.

The Canon EOS R8 outperforms the Sony a7 III in screen resolution, boasting 1,620,000 dots compared to the Sony’s 921,600 dots. This difference provides a clearer and sharper display for users, enhancing the overall user experience.

On the other hand, the Sony a7 III excels in some aspects. However, the given specifications do not show any clear advantage over the Canon EOS R8. Both cameras have their strengths and cater to different preferences and needs.

Taking into account the higher feature score and better screen resolution, the Canon EOS R8 emerges as the better choice for those who prioritize display quality. The Sony a7 III, while slightly behind in score, still offers a well-rounded set of features and remains a viable option for photographers. Ultimately, the decision between the two cameras depends on individual preferences and requirements.

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.
1,620,000 dots
921,600 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.

Canon EOS R8 vs Sony a7 III Storage and Battery

The Sony a7 III outperforms the Canon EOS R8 in storage and battery with a score of 81 to 35. Both cameras accept SD, SDHC, and SDXC memory cards. The Sony a7 III boasts two memory card slots, while the Canon EOS R8 has only one. Additionally, the Sony a7 III supports Memory Stick Duo, Pro Duo, and Pro-HG Duo cards.

The Sony a7 III has a longer battery life, providing 750 shots compared to the Canon EOS R8’s 370 shots. The Sony a7 III uses an NP-FZ100 battery, while the Canon EOS R8 utilizes an LP-E17 battery.

Storage and Battery
Storage and Battery
Memory Card
SD / SDHC / SDXC (UHS-I and II compatible)
SD / SDHC / SDXC, Memory Stick Duo / Pro Duo / Pro-HG Duo
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.
370 shots
750 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.'
24.5 bits
25.1 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'
Main Features
Extra Features
Construction and Durability
Handling and Ergonomics
Value for Money
Total Score

Canon EOS R8 vs Sony a7 III Alternatives

Canon R8 vs Sony a7 III comparison image

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