Sony A7R III vs Sony A7S III

Here, we are looking at the Sony A7R III and Sony A7S III, both Pro Mirrorless cameras and both of them are built by Sony. There is a sizable difference among the resolutions of the A7R III (42MP) and A7S III (12MP) but both cameras provide the identical sensor size (Full frame).

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The A7R III was manufactured 3 years earlier than the A7S III which is a fairly significant difference as far as camera tech is concerned. Each of the cameras feature the same body design (SLR-style mirrorless).

Before delving into a step-by-step comparison, here is a brief overview of how the A7R III scores against the A7S III in relation to portability, imaging, features and an overall score.

Following is a sample of the gallery pics for Sony Alpha A7R III & Sony Alpha A7S III. The entire galleries are viewable at Sony A7R III Gallery & Sony A7S III Gallery.

For those who are looking to carry around your camera, you have to factor in its weight and size. The Sony A7R III provides physical dimensions of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") having a weight of 657 grams (1.45 lbs) while the Sony A7S III has specifications of 129mm x 97mm x 81mm (5.1" x 3.8" x 3.2") and a weight of 699 grams (1.54 lbs).

Contrast the Sony A7R III and Sony A7S III in our completely new Camera & Lens Size Comparison Tool.

Don't forget, the weight of an ILC will differ dependant on the lens you are working with at that time. Here is a front view dimensions comparison of the A7R III versus the A7S III.

Using size and weight, the portability grade of the A7R III and A7S III is 63 and 61 respectively.

Often, it's difficult to picture the difference in sensor sizes purely by looking through specs. The pic below will help offer you a far better sense of the sensor sizes in the A7R III and A7S III.

All in all, the two cameras feature the identical sensor size but different resolution. You can expect to see the Sony A7R III to result in more detail due to its extra 30 Megapixels. Greater resolution can also make it easier to crop pics way more aggressively. The more aged A7R III will be behind in sensor technology.