Nikon D90 vs Pentax K-3 III

Below is a detailed comparison of the Nikon D90 versus Pentax K-3 III, both Advanced DSLR cameras by brands Nikon and Pentax. There is a huge difference among the image resolutions of the D90 (12MP) and K-3 III (26MP) but both cameras have the same sensor measurements (APS-C).

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The D90 was unveiled 13 years before the K-3 III and that is a fairly significant gap as far as camera tech is concerned. Each of these cameras have the same body design (Mid-size SLR).

Before going into a thorough comparison, here is a short view of how the D90 grades vs the K-3 III in the way of portability, imaging, features and an overall grade.

The following is a sample of the gallery pictures for Nikon D90 and Pentax K-3 Mark III. The full galleries are viewable at Nikon D90 Gallery and Pentax K-3 III Gallery.

If you're intending to lug around your camera frequently, you need to consider its weight and dimensions. The Nikon D90 features physical measurements of 132mm x 103mm x 77mm (5.2" x 4.1" x 3.0") along with a weight of 703 grams (1.55 lbs) whilst the Pentax K-3 III has dimensions of 135mm x 104mm x 74mm (5.3" x 4.1" x 2.9") having a weight of 820 grams (1.81 lbs).

Check the Nikon D90 versus Pentax K-3 III in the latest Camera with Lens Size Comparison Tool.

Do not forget, the weight of an Interchangeable Lens Camera will vary based on the lens you have at that moment. Following is a front view size comparison of the D90 and the K-3 III.

Factoring in size and weight, the portability grade of the D90 and K-3 III is 60 and 58 respectively.

Usually, it is tough to visualize the contrast in sensor measurements just by viewing a spec sheet. The graphic underneath should give you a better sense of the sensor sizing in the D90 and K-3 III.

As you can see, both of these cameras provide the same sensor dimensions but different MP. You should anticipate the Pentax K-3 III to result in extra detail having an extra 14 Megapixels. Greater resolution will make it easier to crop photos more aggressively. The older D90 will be disadvantaged in sensor innovation.