Pentax W90 vs Sony A57

Let's take a deeper look at the Pentax W90 vs Sony A57, one is a Waterproof and the other is a Entry-Level DSLR by companies Pentax and Sony. There is a sizeable difference between the resolutions of the W90 (12MP) and A57 (16MP) and the W90 (1/2.3") and A57 (APS-C) come with totally different sensor size.

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The W90 was released 3 years prior to the A57 which is quite a large gap as far as tech is concerned. The two cameras come with different body type with the Pentax W90 being a Compact camera and the Sony A57 being a Compact SLR camera.

Before getting straight into a thorough comparison, below is a quick synopsis of how the W90 grades versus the A57 in relation to portability, imaging, features and an overall score.

Here is a sample of the gallery pictures for Pentax Optio W90 and Sony SLT-A57. The complete galleries are available at Pentax W90 Gallery and Sony A57 Gallery.

For anybody who is looking to carry around your camera often, you're going to have to think about its weight and size. The Pentax W90 provides outside dimensions of 108mm x 59mm x 25mm (4.3" x 2.3" x 1.0") with a weight of 164 grams (0.36 lbs) while the Sony A57 has specifications of 132mm x 98mm x 81mm (5.2" x 3.9" x 3.2") with a weight of 618 grams (1.36 lbs).

Contrast the Pentax W90 vs Sony A57 in the all new Camera and Lens Size Comparison Tool.

Take into account, the weight of an Interchangeable Lens Camera will differ based on the lens you choose during that time. Following is the front view overall size comparison of the W90 versus the A57.

Using size and weight, the portability score of the W90 and A57 is 94 and 64 respectively.

Usually, it's hard to see the difference between sensor sizes simply by looking at specs. The pic underneath should offer you a greater sense of the sensor sizes in the W90 and A57.

As you can plainly see, both of these cameras have got different resolutions and different sensor sizes. The W90 because of its tinier sensor will make getting shallower depth of field more difficult and the Sony A57 will resolve more detail as a result of its extra 4 Megapixels. Greater resolution can also let you crop images much more aggressively. The more aged W90 is going to be behind in sensor innovation.