Panasonic GF1 vs Pentax K20D

Following is a complete comparison of the Panasonic GF1 and Pentax K20D, one is a Entry-Level Mirrorless and the other is a Advanced DSLR by brands Panasonic and Pentax. The image resolution of the GF1 (12MP) and the K20D (15MP) is fairly well matched but the GF1 (Four Thirds) and K20D (APS-C) boast different sensor size.

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The GF1 was introduced 16 months after the K20D making them a generation away from each other. Each of the cameras have different body design with the Panasonic GF1 being a Rangefinder-style mirrorless camera and the Pentax K20D being a Mid-size SLR camera.

Before we go right into a detailed comparison, here is a quick view of how the GF1 scores vs the K20D when considering portability, imaging, features and an overall score.

Below is a sample of the gallery pictures for Panasonic Lumix DMC-GF1 and Pentax K20D. The whole galleries are provided at Panasonic GF1 Gallery and Pentax K20D Gallery.

For those who are looking to carry around your camera frequently, you need to factor in its weight and size. The Panasonic GF1 offers external measurements of 119mm x 71mm x 36mm (4.7" x 2.8" x 1.4") accompanied by a weight of 385 grams (0.85 lbs) while the Pentax K20D has specifications of 142mm x 101mm x 70mm (5.6" x 4.0" x 2.8") with a weight of 800 grams (1.76 lbs).

Examine the Panasonic GF1 and Pentax K20D in the latest Camera with Lens Size Comparison Tool.

Don't forget, the weight of an Interchangeable Lens Camera will change based on the lens you have chosen at the time. Underneath is a front view sizing comparison of the GF1 versus the K20D.

Factoring in size and weight, the portability rating of the GF1 and K20D is 85 and 59 respectively.

Oftentimes, it's difficult to visualize the difference between sensor sizes just by checking technical specs. The picture below may give you a more clear sense of the sensor measurements in the GF1 and K20D.

As you have seen, both of the cameras provide different resolutions and different sensor sizes. The GF1 having a tinier sensor is going to make getting bokeh tougher and the Pentax K20D will give you extra detail using its extra 3MP. Greater resolution will help you crop pics more aggressively. The newer GF1 should have a benefit in sensor innovation.