Pentax K-3 III vs Sony A99

In this write-up, we will be looking at the Pentax K-3 III versus Sony A99, both Advanced DSLR digital cameras by competitors Pentax and Sony. The resolution of the K-3 III (26MP) and the A99 (24MP) is pretty well matched but the K-3 III (APS-C) and A99 (Full frame) enjoy totally different sensor size.

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The K-3 III was released 8 years after the A99 which is quite a large difference as far as tech is concerned. Both of these cameras offer the identical body type (Mid-size SLR).

Before diving in to a step-by-step comparison, below is a simple synopsis of how the K-3 III scores vs the A99 with respect to portability, imaging, features and an overall score.

Here is a preview of the gallery images for Pentax K-3 Mark III & Sony SLT-A99. The complete galleries are available at Pentax K-3 III Gallery & Sony A99 Gallery.

If you're aiming to carry around your camera, you'll have to take into account its weight and proportions. The Pentax K-3 III has got physical measurements of 135mm x 104mm x 74mm (5.3" x 4.1" x 2.9") having a weight of 820 grams (1.81 lbs) whilst the Sony A99 has measurements of 147mm x 111mm x 78mm (5.8" x 4.4" x 3.1") with a weight of 812 grams (1.79 lbs).

Take a look at the Pentax K-3 III versus Sony A99 in our newest Camera & Lens Size Comparison Tool.

Remember, the weight of an ILC will change dependant on the lens you choose during that time. Underneath is the front view size comparison of the K-3 III vs the A99.

Using size and weight, the portability score of the K-3 III and A99 is 58 and 57 respectively.

Oftentimes, it is hard to see the contrast between sensor sizes purely by looking at specs. The image here may offer you a clearer sense of the sensor sizing in the K-3 III and A99.

As you can plainly see, each of these cameras enjoy different resolutions and different sensor sizes. The K-3 III because of its tinier sensor will make shooting shallow depth of field harder and the Pentax K-3 III will give more detail as a result of its extra 2MP. Higher resolution will also enable you to crop shots far more aggressively. The more modern K-3 III is going to have an advantage in sensor tech.