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Canon EOS 5D Mark III vs Sony a7 III Comparison

Storage & Battery

Canon EOS 5D Mark III

Canon EOS 5D Mark III

Sony a7 III

Sony A7 III camera
Canon EOS 5D Mark III
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.
March 02, 2012
February 27, 2018
Camera Type
Camera Size
Camera Weight

The Sony a7 III outperforms the Canon EOS 5D Mark III with a score of 80/100 compared to 65/100. Both cameras share similarities such as their release years, 2018 and 2012 respectively, and their launch prices of $2000 and $3499. However, the Sony a7 III has the advantage of being a mirrorless camera, resulting in a smaller size (127 x 96 x 74mm) and lighter weight (650g) compared to the Canon 5D Mark III’s DSLR build (152 x 116 x 76mm) and heavier weight (950g).

The Canon 5D Mark III still holds its ground with its DSLR capabilities, providing a robust and reliable camera experience. However, the Sony a7 III’s higher score reflects its modern technology and compact design, making it a more attractive option for photographers today.

Canon EOS 5D Mark III vs Sony a7 III Overview and Optics

The Sony a7 III is the winner in terms of optics, with a score of 81/100 compared to the Canon EOS 5D Mark III’s 67/100. Both cameras have some similarities in their specifications. They both feature a CMOS sensor, full-frame sensor size, and are compatible with their respective lens mounts – Canon EF for the 5D Mark III and Sony FE for the a7 III.

The Sony a7 III outperforms the Canon EOS 5D Mark III in several aspects. It has a higher megapixel count of 24.2 compared to the 5D Mark III’s 22.3, which results in better image resolution. The a7 III also has a faster shooting speed of 10 frames per second, while the 5D Mark III manages 6 frames per second. The a7 III’s sensor has a DXOMARK score of 96, whereas the 5D Mark III’s sensor scores 81, indicating better overall sensor performance. Additionally, the Sony a7 III has image stabilization, which the Canon EOS 5D Mark III lacks.

The Canon EOS 5D Mark III, however, has its advantages. Its Digic 5+ processor is known for its reliability and performance, although the Sony a7 III’s Bionz X processor is also highly regarded. The 5D Mark III also has an extensive range of Canon EF lenses available, providing more options for photographers.

Taking these factors into account, the Sony a7 III is the superior camera in terms of optics due to its higher megapixel count, faster shooting speed, better sensor performance, and image stabilization. The Canon EOS 5D Mark III remains a strong option for those who prefer the Canon ecosystem and have invested in EF lenses.

The higher the number of megapixels, the more detail the cameras sensor can capture.
22.3 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.
5760 x 3840 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.
24 x 36 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.
6 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 EF
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 5+
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.
Optical (pentaprism)
Viewfinder Resolution
2,359,296 dots

Canon EOS 5D Mark III vs Sony a7 III Video Performance

The Canon EOS 5D Mark III and the Sony a7 III both have a video score of 56/100. Despite having the same score, these cameras have different video capabilities, which will appeal to different users depending on their needs.

Both cameras share some common video specifications. Neither of them has built-in time-lapse functionality, meaning users will need external accessories or software to achieve this effect. Additionally, both cameras can record Full HD videos, with the Canon 5D Mark III having a maximum video resolution of 1920 x 1080.

The Sony a7 III surpasses the Canon 5D Mark III in terms of video resolution, as it can record 4K videos with a maximum dimension of 3840 x 2160. This higher resolution allows for more detail and clarity in the videos, making it a better choice for those who prioritize video quality. However, the Sony a7 III has a maximum video frame rate of 30fps, which is lower than the Canon 5D Mark III’s 60fps.

The Canon 5D Mark III excels in its maximum video frame rate, offering 60fps compared to the Sony a7 III’s 30fps. This higher frame rate allows for smoother video playback and is particularly useful for capturing fast-moving subjects or creating slow-motion effects. However, the Canon 5D Mark III is limited to Full HD video resolution, which may not be sufficient for users who require 4K video quality.

In conclusion, the Sony a7 III is the better choice for users who prioritize video resolution, as it offers 4K video capabilities. On the other hand, the Canon 5D Mark III is more suitable for those who value higher frame rates for smoother video playback and slow-motion effects. Despite having the same video score, these cameras cater to different user preferences in terms of video capabilities.

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.
Full HD
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.
1920 x 1080 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.
60 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.

Canon EOS 5D Mark III vs Sony a7 III Features and Benefits

The Sony a7 III outperforms the Canon EOS 5D Mark III in features, scoring 81/100 compared to the Canon’s 59/100. Both cameras lack GPS, but they differ in other aspects.

The Sony a7 III and Canon EOS 5D Mark III have screen sizes of 3 inches and 3.2 inches, respectively. The Canon has a higher screen resolution of 1,040,000 dots, while the Sony has 921,600 dots. However, the Sony a7 III boasts a touchscreen and flip screen, making it more versatile and user-friendly than the Canon EOS 5D Mark III.

Additionally, the Sony a7 III is equipped with WiFi and Bluetooth capabilities, allowing for seamless connectivity and sharing options. The Canon EOS 5D Mark III lacks these features, limiting its functionality in today’s technology-driven world.

Despite its lower feature score, the Canon EOS 5D Mark III has a larger screen and higher resolution, which some users may prefer for a more detailed view. However, this advantage does not outweigh the numerous benefits offered by the Sony a7 III.

Ultimately, the Sony a7 III has a clear advantage in features over the Canon EOS 5D Mark III, with a higher score, touchscreen, flip screen, WiFi, and Bluetooth capabilities. The Canon’s larger screen and higher resolution are not enough to surpass the Sony’s comprehensive feature set. When comparing these two cameras, the Sony a7 III is the superior choice in terms of features.

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
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 5D Mark III vs Sony a7 III Storage and Battery

The Canon EOS 5D Mark III wins in the storage and battery category with a score of 76, while the Sony a7 III scores 68. Both cameras have two memory card slots and do not support USB charging. The 5D Mark III accepts SD/SDHC/SDXC, Compact Flash, and UDMA cards, whereas the a7 III takes SD/SDHC/SDXC and Memory Stick Duo/Pro Duo/Pro-HG Duo cards.

The 5D Mark III outperforms the a7 III in battery life, offering 950 shots compared to the a7 III’s 750 shots. The 5D Mark III uses an LP-E6 battery, while the a7 III uses an NP-FZ100 battery. The a7 III does not have any notable advantages in storage and battery over the 5D Mark III.

The Canon EOS 5D Mark III’s superior battery life and compatibility with a wider range of memory cards make it the better choice in terms of storage and battery performance. The Sony a7 III falls short in this area, offering fewer shots per charge and limited memory card options.

Storage and Battery
Storage and Battery
Memory Card
SD / SDHC / SDXC, Compact Flash, UDMA
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.
950 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 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.'
11.7 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 5D Mark III vs Sony a7 III – Our Verdict

Canon EOS 5D Mark III vs Sony a7 III Comparison image.

Are you still undecided about which camera is right for you? Have a look at these popular comparisons that feature the Canon EOS 5D Mark III or the Sony a7 III:

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