Pentax 645D vs Pentax K100D S

Here, we will be analyzing the Pentax 645D vs Pentax K100D S, former is a Pro DSLR while the latter is a Entry-Level DSLR and both of them are offered by Pentax. There exists a considerable gap among the image resolutions of the 645D (40MP) and K100D S (6MP) and the 645D (Medium format) and K100D S (APS-C) have totally different sensor size.

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The 645D was unveiled 2 years after the K100D S which is a fairly large difference as far as camera technology is concerned. Both the cameras feature different body design with the Pentax 645D being a Large SLR camera and the Pentax K100D S being a Compact SLR camera.

Before diving straight to a in-depth comparison, here is a short summation of how the 645D matches up against the K100D S for portability, imaging, features and an overall score.

Following is a preview of the gallery photos for Pentax 645D & Pentax K100D Super. The full galleries are available at Pentax 645D Gallery & Pentax K100D S Gallery.

If you are going to carry around your camera, you will have to factor its weight and dimensions. The Pentax 645D has outside dimensions of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") with a weight of 1480 grams (3.26 lbs) while the Pentax K100D S has dimensions of 129mm x 91mm x 71mm (5.1" x 3.6" x 2.8") having a weight of 646 grams (1.42 lbs).

Analyze the Pentax 645D vs Pentax K100D S in our completely new Camera & Lens Size Comparison Tool.

Remember that, the weight of an ILC will vary dependant on the lens you have attached at that moment. Here is a front view measurement comparison of the 645D against the K100D S.

Taking into account dimensions and weight, the portability score of the 645D and K100D S is 50 and 65 respectively.

Quite often, its difficult to see the gap in sensor sizes only by researching specs. The image here will give you a clearer sense of the sensor dimensions in the 645D and K100D S.

As you can plainly see, both of the cameras feature different megapixels and different sensor sizes. The 645D using its bigger sensor will make achieving shallower DOF less difficult and the Pentax 645D will provide you with more detail having an extra 34MP. Higher resolution can also help you crop pictures way more aggressively. The fresher 645D is going to have an edge with regard to sensor tech.