Sony A7S III vs Sony a5100

Lets look a bit more closely at the Sony A7S III and Sony a5100, former is a Pro Mirrorless while the latter is a Entry-Level Mirrorless and both of them are designed by Sony. There exists a large gap between the resolutions of the A7S III (12MP) and a5100 (24MP) and the A7S III (Full frame) and a5100 (APS-C) boast totally different sensor sizes.

Photography Glossary

The A7S III was announced 6 years after the a5100 which is quite a serious difference as far as technology is concerned. Each of these cameras have different body design with the Sony A7S III being a SLR-style mirrorless camera and the Sony a5100 being a Rangefinder-style mirrorless camera.

Before getting right into a thorough comparison, here is a simple introduction of how the A7S III grades vs the a5100 with regard to portability, imaging, features and an overall mark.

Below is a preview of the gallery images for Sony Alpha A7S III & Sony Alpha a5100. The whole galleries are available at Sony A7S III Gallery & Sony a5100 Gallery.

If you are intending to travel with your camera often, you will have to consider its weight and dimensions. The Sony A7S III enjoys outer measurements of 129mm x 97mm x 81mm (5.1" x 3.8" x 3.2") with a weight of 699 grams (1.54 lbs) whilst the Sony a5100 has dimensions of 110mm x 63mm x 36mm (4.3" x 2.5" x 1.4") with a weight of 283 grams (0.62 lbs).

Take a look at the Sony A7S III and Sony a5100 in our completely new Camera plus Lens Size Comparison Tool.

Bear in mind, the weight of an ILC will change based on the lens you are employing at the time. Below is a front view dimension comparison of the A7S III against the a5100.

Taking into account dimensions and weight, the portability rating of the A7S III and a5100 is 61 and 89 respectively.

Quite often, it is very hard to envision the difference between sensor dimensions just by reviewing technical specs. The image underneath may offer you a far better sense of the sensor measurements in the A7S III and a5100.

As you can tell, both cameras have different megapixels and different sensor dimensions. The A7S III using its bigger sensor will make shooting shallower depth of field less difficult and the Sony a5100 will offer extra detail with its extra 12 Megapixels. Higher resolution will also help you crop pictures a bit more aggressively. The younger A7S III is going to have an edge when it comes to sensor technology.