Pentax K-5 IIs vs Sony A7 III

On this page, we will be reviewing the Pentax K-5 IIs and Sony A7 III, one is a Advanced DSLR and the latter is a Pro Mirrorless by competitors Pentax and Sony. There exists a big gap between the image resolutions of the K-5 IIs (16MP) and A7 III (24MP) and the K-5 IIs (APS-C) and A7 III (Full frame) provide totally different sensor sizes.

Pentax 17 Pre-Orders Outperform Expectations by a Landslide

The K-5 IIs was released 5 years earlier than the A7 III which is quite a big gap as far as technology is concerned. Each of these cameras have different body design with the Pentax K-5 IIs being a Mid-size SLR camera and the Sony A7 III being a SLR-style mirrorless camera.

Before delving into a complete comparison, here is a brief highlight of how the K-5 IIs matches up vs the A7 III in terms of portability, imaging, features and an overall score.

Here is a preview of the gallery images for Pentax K-5 IIs and Sony Alpha A7 III. The complete galleries are available at Pentax K-5 IIs Gallery and Sony A7 III Gallery.

When you are planning to carry around your camera frequently, you will need to factor in its weight and dimensions. The Pentax K-5 IIs has outside dimensions of 131mm x 97mm x 73mm (5.2" x 3.8" x 2.9") with a weight of 760 grams (1.68 lbs) whilst the Sony A7 III has dimensions of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") along with a weight of 650 grams (1.43 lbs).

Take a look at the Pentax K-5 IIs and Sony A7 III in the latest Camera and Lens Size Comparison Tool.

Bear in mind, the weight of an Interchangeable Lens Camera will change depending on the lens you have at that time. Underneath is a front view scale comparison of the K-5 IIs compared to the A7 III.

Factoring in dimensions and weight, the portability score of the K-5 IIs and A7 III is 60 and 63 respectively.

Sometimes, it can be difficult to visualise the difference between sensor sizes simply by reading through technical specs. The picture underneath will offer you a clearer sense of the sensor dimensions in the K-5 IIs and A7 III.

As you have seen, the 2 cameras provide different megapixels and different sensor sizes. The K-5 IIs because of its tinier sensor will make achieving shallower DOF tougher and the Sony A7 III will resolve greater detail as a result of its extra 8MP. Higher resolution will also make it easier to crop shots more aggressively. The more aged K-5 IIs is going to be disadvantaged when it comes to sensor innovation.