Pentax K20D weighs 800 g (1.76 lb / 28.22 oz) and has external dimensions of 142 x 101 x 70 mm (5.59 x 3.98 x 2.76″). Considering that the average weight of DSLR type cameras is 773g, its weight is about average in its class. With a thickness of 70mm, it also has an average thickness.
Here is the front and top view image of Pentax K20D with the dimensions:
In order to give you a better idea about the real life size of Pentax K20D, we have added an image of how it looks next to a credit card and an AA type battery.
Now let's compare Pentax K20D size with the camera that it replaced: Pentax K10D. As depicted on the comparison image, and have the exact same height, width and thickness.
Below you can find the comparison of the weight and thickness of Pentax K20D with its main competitors:
Pentax K20D has environmental sealings on its body which makes it a weather resistant camera, providing resistance against the water and dust getting in to the camera. If you like outdoors photography and want to be able to use your camera in extreme conditions, Pentax K20D will serve you well. If you attach one of these Pentax K20D weather Sealed lenses to your camera, you will have a great all weather kit.