Pentax K-3 III vs Sony A850

Here is a in-depth overview of the Pentax K-3 III and Sony A850, both Advanced DSLR cameras by brands Pentax and Sony. The resolution of the K-3 III (26MP) and the A850 (25MP) is pretty close but the K-3 III (APS-C) and A850 (Full frame) posses totally different sensor sizes.

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The K-3 III was unveiled 11 years later than the A850 and that is a fairly serious gap as far as camera tech is concerned. Each of the cameras feature the same body design (Mid-size SLR).

Before getting straight to a thorough comparison, here is a quick summary of how the K-3 III grades vs the A850 in relation to portability, imaging, features and an overall rating.

Here is a preview of the gallery images for Pentax K-3 Mark III and Sony Alpha DSLR-A850. The full galleries are available at Pentax K-3 III Gallery and Sony A850 Gallery.

For anybody who is aiming to carry your camera, you will want to factor in its weight and size. The Pentax K-3 III offers exterior measurements of 135mm x 104mm x 74mm (5.3" x 4.1" x 2.9") along with a weight of 820 grams (1.81 lbs) and the Sony A850 has specifications of 156mm x 117mm x 82mm (6.1" x 4.6" x 3.2") along with a weight of 895 grams (1.97 lbs).

Compare the Pentax K-3 III and Sony A850 in the latest Camera with Lens Size Comparison Tool.

Do not forget, the weight of an Interchangeable Lens Camera will change dependant on the lens you have attached at that time. The following is a front view size comparison of the K-3 III and the A850.

Taking into consideration size and weight, the portability grade of the K-3 III and A850 is 58 and 54 respectively.

Often, it is very difficult to visualise the gap in sensor sizing merely by looking through a spec sheet. The photograph here will give you a greater sense of the sensor sizing in the K-3 III and A850.

As you can see, both of those cameras feature different megapixels and different sensor sizing. The K-3 III having a smaller sensor will make getting shallower DOF harder and the Pentax K-3 III will result in more detail having an extra 1MP. Higher resolution will also make it easier to crop pictures way more aggressively. The newer K-3 III is going to have a benefit when it comes to sensor tech.