Sony A7R III vs Sony A77

Let's look much closer at the Sony A7R III vs Sony A77, one is a Pro Mirrorless and the latter is a Advanced DSLR and both are produced by Sony. There exists a significant gap among the image resolutions of the A7R III (42MP) and A77 (24MP) and the A7R III (Full frame) and A77 (APS-C) provide different sensor size.

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The A7R III was released 6 years after the A77 which is a fairly sizable gap as far as camera technology is concerned. Both of these cameras feature different body design with the Sony A7R III being a SLR-style mirrorless camera and the Sony A77 being a Mid-size SLR camera.

Before we go straight to a thorough comparison, here is a short summary of how the A7R III grades versus the A77 in regards to portability, imaging, features and an overall score.

Following is a preview of the gallery photos for Sony Alpha A7R III and Sony SLT-A77. The complete galleries are viewable at Sony A7R III Gallery and Sony A77 Gallery.

For those who are going to carry around your camera regularly, you need to factor its weight and volume. The Sony A7R III comes with outside dimensions of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") with a weight of 657 grams (1.45 lbs) while the Sony A77 has sizing of 143mm x 104mm x 81mm (5.6" x 4.1" x 3.2") along with a weight of 732 grams (1.61 lbs).

Check out the Sony A7R III vs Sony A77 in the new Camera and Lens Size Comparison Tool.

Remember, the weight of an Interchangeable Lens Camera will change depending on the lens you choose at that time. Here is a front view dimensions comparison of the A7R III versus the A77.

Considering dimensions and weight, the portability grade of the A7R III and A77 is 63 and 59 respectively.

Typically, it is very tough to visualize the difference in sensor sizes purely by looking through technical specs. The picture here will give you a better sense of the sensor dimensions in the A7R III and A77.

As you have seen, each of these cameras come with different megapixels and different sensor sizes. The A7R III due to its bigger sensor is going to make shooting shallower DOF less difficult and the Sony A7R III will result in greater detail as a result of its extra 18 Megapixels. Higher resolution can also make it easier to crop pictures a good deal more aggressively. The more recent A7R III should have a benefit in sensor tech.