Pentax I-10 vs Sony A7R III

On this page, we are matching up the Pentax I-10 vs Sony A7R III, former being a Small Sensor Compact while the other is a Pro Mirrorless by companies Pentax and Sony. There is a considerable difference among the resolutions of the I-10 (12MP) and A7R III (42MP) and the I-10 (1/2.3") and A7R III (Full frame) posses totally different sensor sizing.

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The I-10 was manufactured 8 years before the A7R III and that is a fairly large difference as far as camera tech is concerned. Each of these cameras have different body design with the Pentax I-10 being a Compact camera and the Sony A7R III being a SLR-style mirrorless camera.

Before we go straight to a thorough comparison, here is a quick summary of how the I-10 grades versus the A7R III with regards to portability, imaging, features and an overall grade.

The following is a sample of the gallery pictures for Pentax Optio I-10 & Sony Alpha A7R III. The entire galleries are available at Pentax I-10 Gallery & Sony A7R III Gallery.

For anyone who is planning to lug around your camera regularly, you have to consider its weight and size. The Pentax I-10 comes with exterior dimensions of 101mm x 65mm x 28mm (4.0" x 2.6" x 1.1") along with a weight of 153 grams (0.34 lbs) whilst the Sony A7R III has specifications of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") along with a weight of 657 grams (1.45 lbs).

Look at the Pentax I-10 vs Sony A7R III in our brand new Camera plus Lens Size Comparison Tool.

Don't forget, the weight of an ILC will vary based on the lens you have chosen at that time. Below is a front view measurements comparison of the I-10 compared to the A7R III.

Taking into consideration size and weight, the portability score of the I-10 and A7R III is 93 and 63 respectively.

Oftentimes, it can be hard to envision the difference in sensor measurements only by researching technical specs. The photograph here will help give you a far better sense of the sensor sizes in the I-10 and A7R III.

As you have seen, each of these cameras provide different megapixels and different sensor measurements. The I-10 due to its smaller sensor will make achieving shallow depth of field more challenging and the Sony A7R III will provide you with more detail due to its extra 30MP. Greater resolution will also let you crop images more aggressively. The older I-10 will be disadvantaged when it comes to sensor technology.