Pentax 645Z vs Pentax K20D

Let's take a closer look at the Pentax 645Z vs Pentax K20D, former is a Pro DSLR while the latter is a Advanced DSLR and they are both manufactured by Pentax. There is a considerable difference between the image resolutions of the 645Z (51MP) and K20D (15MP) and the 645Z (Medium format) and K20D (APS-C) have totally different sensor dimensions.

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The 645Z was released 5 years after the K20D which is quite a large difference as far as tech is concerned. Each of these cameras have different body design with the Pentax 645Z being a Large SLR camera and the Pentax K20D being a Mid-size SLR camera.

Before delving into a more detailed comparison, here is a simple highlight of how the 645Z matches up vs the K20D with regards to portability, imaging, features and an overall mark.

This is a preview of the gallery photos for Pentax 645Z & Pentax K20D. The complete galleries are viewable at Pentax 645Z Gallery & Pentax K20D Gallery.

In case you're planning to travel with your camera, you should consider its weight and size. The Pentax 645Z provides external dimensions of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") and a weight of 1550 grams (3.42 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).

Look at the Pentax 645Z vs Pentax K20D in our brand new Camera plus Lens Size Comparison Tool.

Take into consideration, the weight of an ILC will change dependant on the lens you select during that time. Below is a front view over all size comparison of the 645Z compared to the K20D.

Taking into account size and weight, the portability score of the 645Z and K20D is 49 and 59 respectively.

Oftentimes, it is hard to envision the difference between sensor dimensions simply by going over specifications. The picture here may give you a more clear sense of the sensor sizes in the 645Z and K20D.

Plainly, both the cameras have different megapixels and different sensor dimensions. The 645Z featuring a bigger sensor will make achieving shallow depth of field easier and the Pentax 645Z will deliver more detail as a result of its extra 36MP. Higher resolution can also allow you to crop pictures a bit more aggressively. The more recent 645Z will have an advantage in sensor technology.