Pentax K-7 vs Sony A7R III

Below, we will be reviewing the Pentax K-7 versus Sony A7R III, one being a Advanced DSLR and the latter is a Pro Mirrorless by companies Pentax and Sony. There exists a crucial gap between the resolutions of the K-7 (15MP) and A7R III (42MP) and the K-7 (APS-C) and A7R III (Full frame) feature different sensor sizing.

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The K-7 was released 9 years prior to the A7R III and that is quite a serious gap as far as technology is concerned. Each of these cameras come with different body type with the Pentax K-7 being a Mid-size SLR camera and the Sony A7R III being a SLR-style mirrorless camera.

Before getting through a more detailed comparison, below is a short introduction of how the K-7 grades versus the A7R III in terms of portability, imaging, features and an overall rating.

Below is a preview of the gallery images for Pentax K-7 and Sony Alpha A7R III. The complete galleries are viewable at Pentax K-7 Gallery and Sony A7R III Gallery.

For anyone who is planning to carry your camera regularly, you have to factor its weight and volume. The Pentax K-7 features exterior measurements of 131mm x 97mm x 73mm (5.2" x 3.8" x 2.9") having a weight of 750 grams (1.65 lbs) whilst 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).

Check out the Pentax K-7 versus Sony A7R III in the all new Camera with Lens Size Comparison Tool.

Remember, the weight of an Interchangeable Lens Camera will change depending on the lens you are utilising at that time. Below is the front view proportions comparison of the K-7 vs the A7R III.

Taking into consideration dimensions and weight, the portability rating of the K-7 and A7R III is 60 and 63 respectively.

Quite often, it is difficult to imagine the difference between sensor sizing simply by reading through technical specs. The graphic underneath should offer you a greater sense of the sensor measurements in the K-7 and A7R III.

As you have seen, each of the cameras have got different resolutions and different sensor sizing. The K-7 featuring a tinier sensor is going to make achieving shallow depth of field tougher and the Sony A7R III will give you greater detail as a result of its extra 27MP. Higher resolution will enable you to crop photographs much more aggressively. The older K-7 is going to be behind in sensor innovation.