Pentax K-x vs Sony A57

Here, we are matching up the Pentax K-x and Sony A57, both Entry-Level DSLR cameras by manufacturers Pentax and Sony. There exists a huge gap among the sensor resolutions of the K-x (12MP) and A57 (16MP) but both cameras posses the identical sensor sizes (APS-C).

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The K-x was launched 3 years earlier than the A57 and that is a fairly significant gap as far as camera technology is concerned. The two cameras feature the same body design (Compact SLR).

Before delving straight to a comprehensive comparison, here is a concise synopsis of how the K-x matches up vs the A57 for portability, imaging, features and an overall grade.

The following is a sample of the gallery pictures for Pentax K-x and Sony SLT-A57. The complete galleries are viewable at Pentax K-x Gallery and Sony A57 Gallery.

For those who are intending to lug around your camera often, you have to take into account its weight and proportions. The Pentax K-x offers exterior dimensions of 123mm x 92mm x 68mm (4.8" x 3.6" x 2.7") having a weight of 580 grams (1.28 lbs) whilst the Sony A57 has measurements of 132mm x 98mm x 81mm (5.2" x 3.9" x 3.2") and a weight of 618 grams (1.36 lbs).

Examine the Pentax K-x and Sony A57 in the new Camera with Lens Size Comparison Tool.

Take into account, the weight of an Interchangeable Lens Camera will differ based on the lens you choose at the time. Underneath is a front view sizing comparison of the K-x compared to the A57.

Factoring in dimensions and weight, the portability rating of the K-x and A57 is 69 and 64 respectively.

Typically, its hard to visualise the difference in sensor measurements only by viewing technical specs. The graphic here might provide you a much better sense of the sensor dimensions in the K-x and A57.

As you have seen, both of these cameras feature the identical sensor size but not the same megapixels. You should anticipate the Sony A57 to provide you with greater detail utilizing its extra 4MP. Greater resolution can also make it easier to crop photos way more aggressively. The older K-x will be disadvantaged in sensor technology.