Pentax X90 vs Sony A7R III

Its time to look a little more in depth at the Pentax X90 vs Sony A7R III, former being a Small Sensor Superzoom while the other is a Pro Mirrorless by brands Pentax and Sony. There exists a sizable gap among the image resolutions of the X90 (12MP) and A7R III (42MP) and the X90 (1/2.3") and A7R III (Full frame) enjoy totally different sensor sizing.

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The X90 was revealed 8 years prior to the A7R III and that is a fairly significant difference as far as camera technology is concerned. Each of the cameras offer different body type with the Pentax X90 being a SLR-like (bridge) camera and the Sony A7R III being a SLR-style mirrorless camera.

Before we go straight into a more detailed comparison, below is a quick view of how the X90 matches up versus the A7R III in the way of portability, imaging, features and an overall grade.

Following is a sample of the gallery pictures for Pentax X90 & Sony Alpha A7R III. The full galleries are viewable at Pentax X90 Gallery & Sony A7R III Gallery.

When you are aiming to lug around your camera often, you're going to have to think about its weight and size. The Pentax X90 features external dimensions of 111mm x 85mm x 110mm (4.4" x 3.3" x 4.3") and a weight of 428 grams (0.94 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).

Compare the Pentax X90 vs Sony A7R III in our completely new Camera plus Lens Size Comparison Tool.

Remember, the weight of an ILC will vary depending on the lens you have chosen at that moment. Underneath is the front view scale comparison of the X90 compared to the A7R III.

Factoring in dimensions and weight, the portability rating of the X90 and A7R III is 69 and 63 respectively.

Normally, it is very difficult to see the difference in sensor measurements simply by viewing specifications. The graphic here should offer you a clearer sense of the sensor sizes in the X90 and A7R III.

To sum up, both of the cameras enjoy different megapixel count and different sensor measurements. The X90 with its smaller sensor will make shooting shallower DOF harder and the Sony A7R III will render extra detail because of its extra 30 Megapixels. Greater resolution will enable you to crop images far more aggressively. The older X90 will be disadvantaged when it comes to sensor tech.