Sony A7III vs Sony A7RIII Which one is for you?


Sony A7III vs Sony A7RIII Which one is for you?

People who are familiar with Sony know that there are typically three different variations in the Sony A7 full-frame line up. Those  who are looking to make the jump to Sony, however,  can be confused easily by the differences in variation. The three Sony mirrorless systems are all identical on the exterior, but under the hood, their features are made to fit completely different photographers.

Sony has most recently released the Sony A7III and the A7RIII, the third generation of their full frame line, as well as the Sony A9, which is their flagship camera that rules above all (in most cases). This article will cover the differences between the A7III vs A7RIII and how their features compare.

First and foremost the A7III and the A7RIII have different megapixel (MP) counts on their sensors. The A7III has 24MP while the A7RIII has 42MP. The 42MP on the A7RIII can make a huge difference for those who are looking to print larger prints, especially for fine artists who typically aim to have the highest amount of clarity for gallery prints. Needless to say, you can still print with 24MP much like we did when we were only limited to 12MP on a full frame body, the only difference is the Dots Per Inch (DPI) on your print. So the closer you are physically to the print, the finer details will become more clearly visible.  Here is a quick guide that I like to use to see if I will ever need a camera with high megapixels.


Another nice feature that the A7RIII has is pixel shift which is a pretty niche feature. If you are doing architectural/archival type of photography, the sensor will shift to capture 4 more shots and collect more data within the sensor. The four images can then be uploaded to a computer editing program which composites the photographs, producing a 169.6 MP image. To help portray what exactly is happening in pixel-shift, Sony has provided a handy visualization.


Other than megapixel count, there is another key feature that differentiates the Sony A7III and the A7RIII and that is the autofocusing capabilities. The A7III has the same autofocusing as the A9, but the difference between the two is that the A9 does not have any screen blackout and when taking silent photography, the A9 does not suffer from rolling shutter, which is a typical occurrence for video. For wedding photography and event photography, the A7III is still a highly viable option because even though there is a roll in the shutter when the silent shutter mode is enabled, subjects will not typically move fast enough where it will be noticeable. 

The A7RIII has less phase detection points at 399 vs the A7III at 693. Within these points, continuous autofocusing paired with Eye-AF works amazingly. For many, the 399 phase detection points of autofocus are sufficient enough for most instances including portrait photography.

There are a few other things to weigh in on differences between the two cameras, like low lighting capabilities, the electronic viewfinder (EVF), and the A7III's lack of a Flash Sync Port. These features to us are not that important because both are great under low light situations even though the A7III has an extra stop of ISO available. The EVF from the A7III vs A7RIII is slightly worse at 2.360k dots @ 60fps vs 3.686k dots @ 100/120fps, which in our opinion, both work great. The lack of the Flash Sync Port is not important because there are plenty of wireless triggers in the market that can compensate for the camera, such as the PocketWizards or the Godox X1 TTL Flash Triggers. These points are not necessarily deal breakers except for the resolution and the focusing system. What kind of photographer are you?

The A7III fits the bill for many wedding photographers who are not trying to fill up their hard drive space with 42MP of raw files, and depending on the computer they are editing with, will have an easier time processing raw files. The Sony A7III is hardly an entry level camera, but a highly capable body that can supply the needs of many photographers, especially at the $2000 price point. For those who are looking to do larger prints and need the high resolution for portraiture, the A7RIII can be the one for you. The resolution is all you need to print most of the sizes that even the most demanding clients could ask for. If you were wondering if this camera is capable of doing wedding photography, it is certainly capable, just remember what entails into capturing a wedding with a 42MP raw file.

Good luck with your decision-making! If you do have any further questions feel free to swing by the store and ask our staff any questions you may have on the camera and they will be more than happy to answer any questions you may have.

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