Panasonic G1 vs Pentax K20D

Its time to look much closer at the Panasonic G1 and Pentax K20D, former being a Entry-Level Mirrorless while the latter is a Advanced DSLR by manufacturers Panasonic and Pentax. The sensor resolution of the G1 (12MP) and the K20D (15MP) is relatively similar but the G1 (Four Thirds) and K20D (APS-C) have different sensor measurements.

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The G1 was revealed 7 months later than the K20D and they are both of a similar age. Both the cameras feature different body design with the Panasonic G1 being a SLR-style mirrorless camera and the Pentax K20D being a Mid-size SLR camera.

Before we go straight to a detailed comparison, here is a short view of how the G1 grades against the K20D when considering portability, imaging, features and an overall grade.

Here is a preview of the gallery photos for Panasonic Lumix DMC-G1 & Pentax K20D. The full galleries are available at Panasonic G1 Gallery & Pentax K20D Gallery.

For anyone who is going to lug around your camera regularly, you should factor its weight and dimensions. The Panasonic G1 provides external measurements of 124mm x 84mm x 45mm (4.9" x 3.3" x 1.8") having a weight of 360 grams (0.79 lbs) whilst the Pentax K20D has dimensions of 142mm x 101mm x 70mm (5.6" x 4.0" x 2.8") having a weight of 800 grams (1.76 lbs).

Look at the Panasonic G1 and Pentax K20D in our brand new Camera & Lens Size Comparison Tool.

Do not forget, the weight of an ILC will vary depending on the lens you use at that moment. Below is a front view physical size comparison of the G1 and the K20D.

Taking into account size and weight, the portability score of the G1 and K20D is 82 and 59 respectively.

Usually, it's hard to imagine the difference between sensor measurements only by reviewing specs. The visual below should offer you a clearer sense of the sensor sizing in the G1 and K20D.

All in all, each of these cameras come with different megapixel count and different sensor measurements. The G1 with its tinier sensor is going to make getting shallower DOF more difficult and the Pentax K20D will offer more detail because of its extra 3 Megapixels. Higher resolution will allow you to crop pictures a good deal more aggressively. The fresher G1 provides an edge in sensor technology.