Sony A7III vs A7RIII – Complete Comparison Guide


Sony’s latest A7 cameras literally have the best of every technology out there. They stand out for their mirrorless camera movement and represent the most accessible full-frame systems that you can get.

The A7III and A7RIII DLSRs are relatively smaller, lighter, and more durable than the other gadgets available in the market. They not only have a narrow gap in image quality but also are better performance-wise with a wide range of selection of lenses.

Let us compare the two elite models, Sony A7III vs A7RIII, on the basis of a variety of factors- from exterior to price.

Also, read Different types of lenses to give perfect creative shots if you need more than a basic lens.



1. ISO

ISO is basically a setting that either brightens up or darkens a photograph. It is believed to be advantageous to have a lower resolution sensor in your cameras. The A7RIII offers an ISO range that goes up to 100-32,000 in standard mode and 50-102,400 in expanded mode.

That does seem pretty decent in hindsight, but in comparison with the A7III, it’s not much as the latter goes higher, with a range of ISO 100-51,200 in standard mode and ISO 50-204,000 in expanded mode. Even in low-light photography, the A7III edges ahead as there are fewer photo sites (pixels) on its 24.2-megapixel sensor.

2. Battery life

The battery life could not have been stronger on the Sony A7 series. Both these cameras use Sony’s new FZ1000 battery type, which offers a much-improved battery life.

However, it has been observed that the A7III lasts a bit little longer (610 shots with viewfinder shooting) than the A7RIII that can’t quite match that (530 shots with viewfinder).

3. Autofocus


The AF system on both cameras has quite a sophisticated chip. Despite that, the A7III’s autofocus is much more advanced. Not only does it offer 693 phase-detection points, but it also has a smaller area for accuracy with its 425 contrast AF points. The A7RIII comes nowhere close with just 399 detection points. Unusually, the cheaper camera here has the better autofocus system.

4. Video features

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As such, there is no actual technical difference in video specifications between A7III and A7RIII. Both share the same maximum 30p frame rate for 4K. They also have the ability to capture full-frame width 4K video without pixel binning while maintaining high image quality.

The only difference is how the two cameras render their video footage. The A7III’s lower resolution implies a larger photosite, meaning there’s a potential for less noise at higher ISO settings. The A7III beats the A7RIII over this any day.

5. Continuous shooting

Though showing similar traits while shooting in continuous autofocus, live view mode, and even the silent mode, the A7III’s lower resolution is unbeatable. It certainly has a larger buffer capacity as compared to the A7RIII. The image files have fewer data.

Hence they can be processed and saved more quickly, and the buffer takes longer to fill. The A7RIII, though it can capture images very quickly, can’t keep it up for long. Therefore, the A7III has a significant advantage for action photography.

6. LCD screen


Given that both the cameras feature a 3-inch tilting touchscreen display, the A7RIII has a higher resolution than the A7III. In practice, even the A7III's screen has a lower resolution which hits the point of the individual dots not being visible to the naked eye. The higher LCD resolution does improve the user experience, but one can hardly tell the difference on its own in order to bend towards the A7RIII.

7. Pixel Shift Multi Shoot


This is a unique feature to the A7RIII only. This feature gives the camera the ability to record full-color data for each photosite with the help of a sensor. The result is slightly improved ultra-fine detail photography with textures. However, to get the perfect shots, the camera and the subject need to be stationary, and the captured images must be merged in Sony’s desktop image processing software.

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8. Price

Price is an important factor for all photography enthusiasts, apart from the specifications. The A7III is cheaper than compared to the A7RIII. It offers great performance while the extra resolution of the A7RIII raises the cost.

This increased cost is for the extra advantages. However, you will have to sacrifice ISO range, autofocus points and buffer capacity in the process. This is up to the user to decide what feature they require more. 


For high-quality commercial photography, the A7RIII is your best bet. Even at a higher price, it has a great combination of resolution, speed and video features as compared to professional cameras from other brands.

The A7III is perfect for sports and low-light photographers. While offering the same continuous shooting speed as the A7RIII, it also has a better buffer capacity, a more sophisticated autofocus system, larger photosites because of the lower resolution and also less noise at higher ISO settings.

For amateurs and enthusiasts looking for value for money, you cannot look at any other than the A7III. The only advantage of the A7RIII has over A7III is its higher resolution which may be unnecessary at most points and will quickly swallow large amounts of space on your memory cards and hard drive.


I'm Xavier. I am a professional writer and blogger. It all started when I fell in love with my camera, which was presented to me when I was ten as a birthday gift. Since then, I wanted to become a cinematographer and also succeeded in that. So I am here researching and reviewing the filmmaking gadgets and giving out my top gadgets from the market.I hope you find my review articles interesting and helpful.

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