Sony A7S III vs Sony A100

Following is a in depth assessment of the Sony A7S III and Sony A100, one is a Pro Mirrorless and the latter is a Entry-Level DSLR and both of them are offered by Sony. The image resolution of the A7S III (12MP) and the A100 (10MP) is pretty close but the A7S III (Full frame) and A100 (APS-C) provide totally different sensor size.

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The A7S III was released 14 years after the A100 which is a fairly serious gap as far as camera tech is concerned. Both the cameras have different body design with the Sony A7S III being a SLR-style mirrorless camera and the Sony A100 being a Compact SLR camera.

Before diving right into a step-by-step comparison, here is a short summation of how the A7S III scores against the A100 in regards to portability, imaging, features and an overall score.

Below is a preview of the gallery images for Sony Alpha A7S III and Sony Alpha DSLR-A100. The complete galleries are provided at Sony A7S III Gallery and Sony A100 Gallery.

If you are looking to carry around your camera regularly, you'll have to consider its weight and size. The Sony A7S III features exterior dimensions of 129mm x 97mm x 81mm (5.1" x 3.8" x 3.2") having a weight of 699 grams (1.54 lbs) while the Sony A100 has specifications of 133mm x 95mm x 71mm (5.2" x 3.7" x 2.8") with a weight of 638 grams (1.41 lbs).

Examine the Sony A7S III and Sony A100 in the latest Camera and Lens Size Comparison Tool.

Always remember, the weight of an Interchangeable Lens Camera will differ depending on the lens you are working with during that time. Here is a front view measurements comparison of the A7S III versus the A100.

Considering size and weight, the portability score of the A7S III and A100 is 61 and 64 respectively.

Generally, it can be tough to envision the gap in sensor sizes only by looking through technical specs. The picture below might offer you a much better sense of the sensor dimensions in the A7S III and A100.

As you have seen, both of these cameras provide different megapixels and different sensor sizes. The A7S III featuring a bigger sensor will make getting bokeh easier and the Sony A7S III will render extra detail as a result of its extra 2MP. Higher resolution can also allow you to crop pictures more aggressively. The more recent A7S III will have a benefit in sensor innovation.