Pentax K-3 vs Sony A390

Below is a detailed comparison of the Pentax K-3 versus Sony A390, former being a Advanced DSLR while the latter is a Entry-Level DSLR by rivals Pentax and Sony. There exists a noticeable gap among the resolutions of the K-3 (24MP) and A390 (14MP) but they enjoy the same exact sensor sizing (APS-C).

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The K-3 was unveiled 3 years later than the A390 and that is a fairly sizable difference as far as camera technology is concerned. Both cameras offer different body type with the Pentax K-3 being a Mid-size SLR camera and the Sony A390 being a Compact SLR camera.

Before delving in to a step-by-step comparison, below is a simple overview of how the K-3 matches up against the A390 with respect to portability, imaging, features and an overall grade.

The following is a preview of the gallery images for Pentax K-3 & Sony Alpha DSLR-A390. The full galleries are provided at Pentax K-3 Gallery & Sony A390 Gallery.

In case you're intending to lug around your camera, you should factor its weight and proportions. The Pentax K-3 comes with exterior measurements of 131mm x 100mm x 77mm (5.2" x 3.9" x 3.0") with a weight of 800 grams (1.76 lbs) whilst the Sony A390 has measurements of 128mm x 97mm x 86mm (5.0" x 3.8" x 3.4") with a weight of 549 grams (1.21 lbs).

Check the Pentax K-3 versus Sony A390 in our newest Camera plus Lens Size Comparison Tool.

Bear in mind, the weight of an ILC will change depending on the lens you are employing at that time. Below is the front view overall size comparison of the K-3 against the A390.

Taking into account dimensions and weight, the portability score of the K-3 and A390 is 59 and 66 respectively.

Normally, it can be hard to imagine the difference in sensor measurements simply by checking out technical specs. The photograph below might offer you a stronger sense of the sensor measurements in the K-3 and A390.

As you can tell, both of those cameras offer the same exact sensor sizing albeit different MP. You can expect the Pentax K-3 to produce more detail having an extra 10 Megapixels. Higher resolution will also allow you to crop photographs a little more aggressively. The more recent K-3 provides a benefit in sensor tech.