Pentax X90 vs Sony A7R IV

Below, we will be evaluating the Pentax X90 and Sony A7R IV, former being a Small Sensor Superzoom while the latter is a Pro Mirrorless by competitors Pentax and Sony. There exists a substantial gap among the sensor resolutions of the X90 (12MP) and A7R IV (61MP) and the X90 (1/2.3") and A7R IV (Full frame) feature different sensor dimensions.

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The X90 was introduced 10 years earlier than the A7R IV and that is a fairly big difference as far as camera technology is concerned. Each of these cameras come with different body type with the Pentax X90 being a SLR-like (bridge) camera and the Sony A7R IV being a SLR-style mirrorless camera.

Before going straight into a step-by-step comparison, below is a concise synopsis of how the X90 grades against the A7R IV in the way of portability, imaging, features and an overall grade.

Below is a preview of the gallery images for Pentax X90 & Sony Alpha A7R IV. The whole galleries are provided at Pentax X90 Gallery & Sony A7R IV Gallery.

When you are going to lug around your camera often, you are going to need to take into account its weight and measurements. The Pentax X90 offers external dimensions of 111mm x 85mm x 110mm (4.4" x 3.3" x 4.3") having a weight of 428 grams (0.94 lbs) whilst the Sony A7R IV has proportions of 129mm x 96mm x 78mm (5.1" x 3.8" x 3.1") accompanied by a weight of 665 grams (1.47 lbs).

See the Pentax X90 and Sony A7R IV in our completely new Camera plus Lens Size Comparison Tool.

Take into consideration, the weight of an ILC will change based on the lens you are employing at the time. The following is the front view dimension comparison of the X90 vs the A7R IV.

Looking at dimensions and weight, the portability rating of the X90 and A7R IV is 69 and 62 respectively.

Typically, it's tough to picture the difference in sensor measurements merely by going through specifications. The graphic underneath should provide you a clearer sense of the sensor sizes in the X90 and A7R IV.

Plainly, the two cameras have got different megapixel count and different sensor measurements. The X90 using its smaller sensor is going to make achieving shallower depth of field more challenging and the Sony A7R IV will show extra detail using its extra 49 Megapixels. Higher resolution can also let you crop shots much more aggressively. The older X90 will be disadvantaged when it comes to sensor technology.