Pentax P70 vs Sony A7R III

Lets look a bit more closely at the Pentax P70 and Sony A7R III, former being a Ultracompact while the latter is a Pro Mirrorless by companies Pentax and Sony. There is a considerable difference between the sensor resolutions of the P70 (12MP) and A7R III (42MP) and the P70 (1/2.3") and A7R III (Full frame) offer totally different sensor sizing.

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The P70 was launched 9 years prior to the A7R III and that is quite a large difference as far as tech is concerned. Both the cameras have different body design with the Pentax P70 being a Ultracompact camera and the Sony A7R III being a SLR-style mirrorless camera.

Before going right into a full comparison, here is a concise overview of how the P70 grades versus the A7R III in terms of portability, imaging, features and an overall grade.

Here is a preview of the gallery photos for Pentax Optio P70 & Sony Alpha A7R III. The complete galleries are viewable at Pentax P70 Gallery & Sony A7R III Gallery.

When you are looking to lug around your camera frequently, you will have to factor its weight and volume. The Pentax P70 has got physical measurements of 97mm x 54mm x 22mm (3.8" x 2.1" x 0.9") accompanied by a weight of 155 grams (0.34 lbs) and the Sony A7R III has sizing of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") along with a weight of 657 grams (1.45 lbs).

Analyze the Pentax P70 and Sony A7R III in our completely new Camera & Lens Size Comparison Tool.

Always remember, the weight of an ILC will vary based on the lens you select at that time. Underneath is a front view scale comparison of the P70 and the A7R III.

Using size and weight, the portability rating of the P70 and A7R III is 95 and 63 respectively.

Usually, it's hard to envision the gap between sensor measurements just by reading technical specs. The visual here should provide you a greater sense of the sensor sizing in the P70 and A7R III.

As you have seen, both of the cameras provide different megapixel count and different sensor measurements. The P70 due to its tinier sensor will make achieving shallower depth of field more difficult and the Sony A7R III will deliver extra detail utilizing its extra 30MP. Higher resolution can also let you crop photographs more aggressively. The older P70 is going to be behind when it comes to sensor technology.