Pentax K-3 vs Sony A7R IV

The following is a detailed analysis of the Pentax K-3 versus Sony A7R IV, former is a Advanced DSLR while the other is a Pro Mirrorless by companies Pentax and Sony. There is a sizable difference between the resolutions of the K-3 (24MP) and A7R IV (61MP) and the K-3 (APS-C) and A7R IV (Full frame) have different sensor sizing.

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The K-3 was announced 6 years earlier than the A7R IV which is quite a significant difference as far as tech is concerned. Both of the cameras have different body design with the Pentax K-3 being a Mid-size SLR camera and the Sony A7R IV being a SLR-style mirrorless camera.

Before getting right into a full comparison, here is a quick summary of how the K-3 scores vs the A7R IV for portability, imaging, features and an overall mark.

Following is a sample of the gallery pictures for Pentax K-3 & Sony Alpha A7R IV. The whole galleries are available at Pentax K-3 Gallery & Sony A7R IV Gallery.

For anyone who is intending to travel with your camera, you will have to consider its weight and dimensions. The Pentax K-3 features physical measurements of 131mm x 100mm x 77mm (5.2" x 3.9" x 3.0") and a weight of 800 grams (1.76 lbs) while the Sony A7R IV has dimensions of 129mm x 96mm x 78mm (5.1" x 3.8" x 3.1") and a weight of 665 grams (1.47 lbs).

Analyze the Pentax K-3 versus Sony A7R IV in our completely new Camera plus Lens Size Comparison Tool.

Don't forget, the weight of an ILC will vary depending on the lens you are working with at the time. Here is a front view sizing comparison of the K-3 and the A7R IV.

Taking into consideration size and weight, the portability rating of the K-3 and A7R IV is 59 and 62 respectively.

Often, it is very difficult to picture the gap between sensor dimensions only by looking at technical specs. The pic underneath will help provide you a more clear sense of the sensor sizing in the K-3 and A7R IV.

As you can tell, each of these cameras provide different megapixels and different sensor dimensions. The K-3 having a tinier sensor is going to make shooting bokeh more difficult and the Sony A7R IV will resolve extra detail with its extra 37MP. Greater resolution will also let you crop images more aggressively. The more aged K-3 is going to be behind with regard to sensor tech.