Pentax K-3 vs Sony A57

In this article, we are matching up the Pentax K-3 and Sony A57, one is a Advanced DSLR and the other is a Entry-Level DSLR by rivals Pentax and Sony. There is a big difference among the sensor resolutions of the K-3 (24MP) and A57 (16MP) but they come with the same exact sensor dimensions (APS-C).

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The K-3 was revealed 20 months after the A57 making the cameras a generation away from each other. Each of these cameras offer different body type with the Pentax K-3 being a Mid-size SLR camera and the Sony A57 being a Compact SLR camera.

Before we go straight into a in-depth comparison, below is a quick highlight of how the K-3 grades versus the A57 in the way of portability, imaging, features and an overall mark.

Here is a sample of the gallery pics for Pentax K-3 and Sony SLT-A57. The full galleries are provided at Pentax K-3 Gallery and Sony A57 Gallery.

For those who are going to travel with your camera often, you'll have to take into account 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") and a weight of 800 grams (1.76 lbs) while the Sony A57 has sizing of 132mm x 98mm x 81mm (5.2" x 3.9" x 3.2") accompanied by a weight of 618 grams (1.36 lbs).

Compare the Pentax K-3 and Sony A57 in the all new Camera with Lens Size Comparison Tool.

Remember, the weight of an Interchangeable Lens Camera will differ depending on the lens you have attached at the time. The following is the front view size comparison of the K-3 versus the A57.

Considering size and weight, the portability grade of the K-3 and A57 is 59 and 64 respectively.

Oftentimes, its tough to visualise the contrast in sensor dimensions just by researching specifications. The image below will give you a greater sense of the sensor sizing in the K-3 and A57.

Plainly, the two cameras enjoy the same exact sensor sizing but not the same megapixels. You should expect to see the Pentax K-3 to result in more detail because of its extra 8 Megapixels. Greater resolution can also help you crop photos far more aggressively. The younger K-3 will have an edge in sensor technology.