Sony A7S III vs Sony A55

In this write-up, we are analyzing the Sony A7S III and Sony A55, one is a Pro Mirrorless and the other is a Entry-Level DSLR and they are both designed by Sony. There is a crucial difference between the sensor resolutions of the A7S III (12MP) and A55 (16MP) and the A7S III (Full frame) and A55 (APS-C) use different sensor measurements.

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The A7S III was launched 10 years after the A55 which is quite a serious gap as far as tech is concerned. Each of the cameras offer different body type with the Sony A7S III being a SLR-style mirrorless camera and the Sony A55 being a Compact SLR camera.

Before getting through a step-by-step comparison, below is a simple summation of how the A7S III scores against the A55 in the way of portability, imaging, features and an overall mark.

The following is a sample of the gallery pictures for Sony Alpha A7S III and Sony SLT-A55. The complete galleries are available at Sony A7S III Gallery and Sony A55 Gallery.

For anyone who is intending to travel with your camera often, you will need to take into account its weight and size. The Sony A7S III comes with external dimensions of 129mm x 97mm x 81mm (5.1" x 3.8" x 3.2") with a weight of 699 grams (1.54 lbs) and the Sony A55 has specifications of 124mm x 92mm x 85mm (4.9" x 3.6" x 3.3") accompanied by a weight of 500 grams (1.10 lbs).

Check the Sony A7S III and Sony A55 in the new Camera with 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 the front view measurement comparison of the A7S III vs the A55.

Taking into consideration size and weight, the portability grade of the A7S III and A55 is 61 and 67 respectively.

In many cases, its hard to picture the difference between sensor dimensions purely by reading specifications. The picture underneath will help provide you a greater sense of the sensor sizes in the A7S III and A55.

To sum up, both the cameras offer different megapixel count and different sensor dimensions. The A7S III due to its larger sensor is going to make achieving shallow DOF simpler and the Sony A55 will offer extra detail utilizing its extra 4 Megapixels. Greater resolution will enable you to crop photos a little more aggressively. The younger A7S III provides an advantage when it comes to sensor tech.