Pentax 645D vs Pentax K-x

Following is a extended review of the Pentax 645D vs Pentax K-x, former is a Pro DSLR while the latter is a Entry-Level DSLR and both of them are created by Pentax. There is a large difference among the resolutions of the 645D (40MP) and K-x (12MP) and the 645D (Medium format) and K-x (APS-C) posses totally different sensor sizing.

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The 645D was introduced 3 months after the K-x so they are of a similar age. Each of these cameras have different body design with the Pentax 645D being a Large SLR camera and the Pentax K-x being a Compact SLR camera.

Before delving into a complete comparison, here is a quick overview of how the 645D grades versus the K-x for portability, imaging, features and an overall score.

Following is a preview of the gallery photos for Pentax 645D & Pentax K-x. The whole galleries are viewable at Pentax 645D Gallery & Pentax K-x Gallery.

When you are planning to carry around your camera regularly, you are going to need to factor its weight and proportions. The Pentax 645D has got physical measurements of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") along with a weight of 1480 grams (3.26 lbs) while the Pentax K-x has measurements of 123mm x 92mm x 68mm (4.8" x 3.6" x 2.7") along with a weight of 580 grams (1.28 lbs).

Check out the Pentax 645D vs Pentax K-x in our completely new Camera plus Lens Size Comparison Tool.

Bear in mind, the weight of an ILC will change depending on the lens you have at the time. Below is a front view proportions comparison of the 645D compared to the K-x.

Looking at size and weight, the portability score of the 645D and K-x is 50 and 69 respectively.

In many cases, it is very hard to visualise the difference in sensor sizes purely by looking through specs. The picture below should give you a much better sense of the sensor sizing in the 645D and K-x.

All in all, each of the cameras have different resolutions and different sensor sizes. The 645D having a bigger sensor will make shooting shallow depth of field easier and the Pentax 645D will provide you with extra detail using its extra 28 Megapixels. Higher resolution can also enable you to crop pictures a bit more aggressively.