Pentax K20D vs Sony NEX-3

Here, we will be looking at the Pentax K20D and Sony NEX-3, one being a Advanced DSLR and the latter is a Entry-Level Mirrorless by brands Pentax and Sony. The image resolution of the K20D (15MP) and the NEX-3 (14MP) is relatively well matched and both cameras offer the identical sensor sizes (APS-C).

Photography Glossary

The K20D was released 23 months before the NEX-3 which makes them a generation apart from each other. Both of the cameras feature different body design with the Pentax K20D being a Mid-size SLR camera and the Sony NEX-3 being a Rangefinder-style mirrorless camera.

Before going right into a thorough comparison, here is a quick introduction of how the K20D grades vs the NEX-3 in terms of portability, imaging, features and an overall rating.

This is a preview of the gallery photos for Pentax K20D and Sony Alpha NEX-3. The complete galleries are available at Pentax K20D Gallery and Sony NEX-3 Gallery.

For anybody who is planning to carry your camera often, you'll need to factor in its weight and proportions. The Pentax K20D comes with physical dimensions of 142mm x 101mm x 70mm (5.6" x 4.0" x 2.8") having a weight of 800 grams (1.76 lbs) whilst the Sony NEX-3 has measurements of 117mm x 62mm x 33mm (4.6" x 2.4" x 1.3") and a weight of 297 grams (0.65 lbs).

Analyze the Pentax K20D and Sony NEX-3 in the latest Camera and Lens Size Comparison Tool.

Take into consideration, the weight of an Interchangeable Lens Camera will differ depending on the lens you have during that time. Here is a front view dimension comparison of the K20D versus the NEX-3.

Taking into account size and weight, the portability score of the K20D and NEX-3 is 59 and 89 respectively.

Usually, it can be difficult to see the difference between sensor sizing simply by checking a spec sheet. The photograph underneath may provide you a clearer sense of the sensor sizes in the K20D and NEX-3.

As you can see, each of these cameras feature the identical sensor size albeit not the same resolution. You should count on the Pentax K20D to give greater detail as a result of its extra 1MP. Higher resolution can also allow you to crop shots way more aggressively. The older K20D is going to be behind with regard to sensor innovation.