Sony A7R III vs Sony A300

On this page, we will be analyzing the Sony A7R III vs Sony A300, one being a Pro Mirrorless and the latter is a Entry-Level DSLR and both are built by Sony. There is a huge difference among the resolutions of the A7R III (42MP) and A300 (10MP) and the A7R III (Full frame) and A300 (APS-C) have different sensor sizing.

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The A7R III was introduced 9 years later than the A300 and that is a fairly significant gap as far as camera tech is concerned. Both of these cameras have different body design with the Sony A7R III being a SLR-style mirrorless camera and the Sony A300 being a Compact SLR camera.

Before we go into a complete comparison, here is a quick highlight of how the A7R III matches up vs the A300 when considering portability, imaging, features and an overall grade.

Below is a preview of the gallery photos for Sony Alpha A7R III and Sony Alpha DSLR-A300. The whole galleries are available at Sony A7R III Gallery and Sony A300 Gallery.

For anybody who is aiming to lug around your camera frequently, you're going to have to factor in its weight and proportions. The Sony A7R III has physical measurements 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 A300 has measurements of 131mm x 99mm x 75mm (5.2" x 3.9" x 3.0") accompanied by a weight of 632 grams (1.39 lbs).

Check the Sony A7R III vs Sony A300 in the latest Camera and Lens Size Comparison Tool.

Bear in mind, the weight of an Interchangeable Lens Camera will differ depending on the lens you choose at the time. The following is a front view overall size comparison of the A7R III vs the A300.

Taking into consideration size and weight, the portability grade of the A7R III and A300 is 63 and 64 respectively.

Usually, it is very tough to visualize the difference in sensor measurements merely by seeing technical specs. The graphic below should give you a much better sense of the sensor measurements in the A7R III and A300.

As you can tell, the two cameras provide different megapixels and different sensor measurements. The A7R III having a bigger sensor is going to make achieving shallow depth of field simpler and the Sony A7R III will show extra detail using its extra 32 Megapixels. Higher resolution will allow you to crop photographs more aggressively. The more recent A7R III provides an edge in sensor technology.