Sony A7S III vs Sony TX20

On this page, we will be evaluating the Sony A7S III vs Sony TX20, one being a Pro Mirrorless and the latter is a Ultracompact and they are both sold by Sony. There is a significant difference between the image resolutions of the A7S III (12MP) and TX20 (16MP) and the A7S III (Full frame) and TX20 (1/2.3") provide totally different sensor measurements.

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The A7S III was announced 8 years later than the TX20 and that is quite a sizable gap as far as tech is concerned. Each of the cameras have different body design with the Sony A7S III being a SLR-style mirrorless camera and the Sony TX20 being a Ultracompact camera.

Before we go straight to a step-by-step comparison, here is a quick view of how the A7S III scores against the TX20 in the way of portability, imaging, features and an overall grade.

The following is a preview of the gallery images for Sony Alpha A7S III and Sony Cyber-shot DSC-TX20. The whole galleries are viewable at Sony A7S III Gallery and Sony TX20 Gallery.

For anybody who is planning to lug around your camera frequently, you're going to have to factor its weight and measurements. The Sony A7S III features external dimensions of 129mm x 97mm x 81mm (5.1" x 3.8" x 3.2") having a weight of 699 grams (1.54 lbs) whilst the Sony TX20 has proportions of 96mm x 56mm x 18mm (3.8" x 2.2" x 0.7") and a weight of 133 grams (0.29 lbs).

Compare the Sony A7S III vs Sony TX20 in the all new Camera and Lens Size Comparison Tool.

Remember, the weight of an Interchangeable Lens Camera will change depending on the lens you are working with at that moment. Underneath is a front view measurements comparison of the A7S III against the TX20.

Taking into account size and weight, the portability score of the A7S III and TX20 is 61 and 96 respectively.

Usually, its hard to see the gap between sensor measurements simply by reading through a spec sheet. The visual here should offer you a better sense of the sensor sizes in the A7S III and TX20.

Clearly, both of the cameras provide different megapixel count and different sensor measurements. The A7S III having a bigger sensor will make getting shallower DOF simpler and the Sony TX20 will resolve greater detail with its extra 4MP. Higher resolution will allow you to crop photographs more aggressively. The more recent A7S III will have a benefit when it comes to sensor tech.