Pentax K-3 vs Sony A6400

Below is a in depth comparison of the Pentax K-3 and Sony A6400, former being a Advanced DSLR while the latter is a Advanced Mirrorless by companies Pentax and Sony. The sensor resolution of the K-3 (24MP) and the A6400 (24MP) is relatively close and both cameras boast the identical sensor measurements (APS-C).

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The K-3 was released 5 years earlier than the A6400 and that is a fairly serious difference as far as camera tech is concerned. The two cameras feature different body design with the Pentax K-3 being a Mid-size SLR camera and the Sony A6400 being a Rangefinder-style mirrorless camera.

Before diving into a detailed comparison, here is a brief overview of how the K-3 scores versus the A6400 when it comes to portability, imaging, features and an overall grade.

This is a preview of the gallery photos for Pentax K-3 & Sony Alpha a6400. The complete galleries are available at Pentax K-3 Gallery & Sony A6400 Gallery.

If you're looking to lug around your camera frequently, you should factor its weight and volume. The Pentax K-3 features external measurements of 131mm x 100mm x 77mm (5.2" x 3.9" x 3.0") accompanied by a weight of 800 grams (1.76 lbs) and the Sony A6400 has sizing of 120mm x 67mm x 50mm (4.7" x 2.6" x 2.0") and a weight of 403 grams (0.89 lbs).

Check out the Pentax K-3 and Sony A6400 in our completely new Camera & Lens Size Comparison Tool.

Always remember, the weight of an ILC will change dependant on the lens you select at the time. Below is a front view over all size comparison of the K-3 vs the A6400.

Factoring in size and weight, the portability rating of the K-3 and A6400 is 59 and 83 respectively.

In many cases, it's hard to see the difference in sensor measurements purely by researching specs. The visual here will help give you a far better sense of the sensor sizing in the K-3 and A6400.

As you can plainly see, both of these cameras feature the identical sensor size and the exact same megapixels therefore you can expect comparable quality of photos though you will want to consider the launch date of the cameras into account. The older K-3 will be disadvantaged in sensor tech.