Pentax RS1500 vs Sony A7R III

Its time to look more closely at the Pentax RS1500 vs Sony A7R III, one being a Small Sensor Compact and the other is a Pro Mirrorless by competitors Pentax and Sony. There is a huge difference between the image resolutions of the RS1500 (14MP) and A7R III (42MP) and the RS1500 (1/2.3") and A7R III (Full frame) boast totally different sensor sizing.

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The RS1500 was released 7 years earlier than the A7R III and that is quite a significant gap as far as tech is concerned. Each of the cameras have different body design with the Pentax RS1500 being a Compact camera and the Sony A7R III being a SLR-style mirrorless camera.

Before going into a step-by-step comparison, here is a brief view of how the RS1500 scores versus the A7R III with regards to portability, imaging, features and an overall grade.

Below is a sample of the gallery pictures for Pentax Optio RS1500 and Sony Alpha A7R III. The complete galleries are viewable at Pentax RS1500 Gallery and Sony A7R III Gallery.

When you are planning to lug around your camera often, you are going to need to consider its weight and volume. The Pentax RS1500 comes with exterior measurements of 114mm x 58mm x 28mm (4.5" x 2.3" x 1.1") having a weight of 157 grams (0.35 lbs) and the Sony A7R III has sizing of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") and a weight of 657 grams (1.45 lbs).

Compare the Pentax RS1500 vs Sony A7R III in the new Camera with Lens Size Comparison Tool.

Keep in mind, the weight of an Interchangeable Lens Camera will differ based on the lens you select during that time. Underneath is a front view scale comparison of the RS1500 and the A7R III.

Factoring in size and weight, the portability rating of the RS1500 and A7R III is 93 and 63 respectively.

In many cases, it can be difficult to envision the gap between sensor measurements simply by reading through specs. The graphic underneath will help provide you a greater sense of the sensor sizing in the RS1500 and A7R III.

As you can plainly see, each of these cameras have different resolutions and different sensor measurements. The RS1500 because of its tinier sensor will make achieving bokeh more difficult and the Sony A7R III will give you extra detail as a result of its extra 28 Megapixels. Greater resolution will help you crop images a bit more aggressively. The older RS1500 is going to be disadvantaged with regard to sensor innovation.