Sony A7R III vs Sony A100

Lets take a closer look at the Sony A7R III vs Sony A100, one being a Pro Mirrorless and the latter is a Entry-Level DSLR and they are both produced by Sony. There exists a big gap between the image resolutions of the A7R III (42MP) and A100 (10MP) and the A7R III (Full frame) and A100 (APS-C) have different sensor sizing.

Photography Glossary

The A7R III was unveiled 11 years later than the A100 and that is quite a big gap as far as technology is concerned. Both the cameras have different body design with the Sony A7R III being a SLR-style mirrorless camera and the Sony A100 being a Compact SLR camera.

Before diving right into a thorough comparison, here is a quick overview of how the A7R III matches up versus the A100 in regards to portability, imaging, features and an overall grade.

Here is a preview of the gallery images for Sony Alpha A7R III and Sony Alpha DSLR-A100. The full galleries are provided at Sony A7R III Gallery and Sony A100 Gallery.

If you're aiming to lug around your camera, you should consider its weight and measurements. The Sony A7R III offers exterior dimensions of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") and a weight of 657 grams (1.45 lbs) while the Sony A100 has proportions of 133mm x 95mm x 71mm (5.2" x 3.7" x 2.8") having a weight of 638 grams (1.41 lbs).

Look at the Sony A7R III vs Sony A100 in the latest Camera with Lens Size Comparison Tool.

Remember that, the weight of an Interchangeable Lens Camera will differ dependant on the lens you are utilizing during that time. Below is a front view dimensions comparison of the A7R III vs the A100.

Factoring in dimensions and weight, the portability grade of the A7R III and A100 is 63 and 64 respectively.

Typically, it is difficult to picture the difference between sensor measurements just by reviewing specifications. The graphic underneath will help provide you a more clear sense of the sensor dimensions in the A7R III and A100.

To sum up, both of those cameras provide different megapixels and different sensor measurements. The A7R III with its bigger sensor is going to make achieving shallow depth of field easier and the Sony A7R III will offer you more detail having an extra 32 Megapixels. Higher resolution will make it easier to crop shots more aggressively. The fresher A7R III provides a benefit in sensor tech.