Pentax 645D vs Pentax K-5

Here is a extended overview of the Pentax 645D and Pentax K-5, former being a Pro DSLR while the latter is a Advanced DSLR and both are sold by Pentax. There is a considerable difference among the resolutions of the 645D (40MP) and K-5 (16MP) and the 645D (Medium format) and K-5 (APS-C) feature totally different sensor dimensions.

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The 645D was released 9 months prior to the K-5 so they are both of a similar age. Both the cameras offer different body type with the Pentax 645D being a Large SLR camera and the Pentax K-5 being a Mid-size SLR camera.

Before delving straight into a in depth comparison, below is a short introduction of how the 645D matches up against the K-5 in regards to portability, imaging, features and an overall rating.

Here is a preview of the gallery photos for Pentax 645D & Pentax K-5. The complete galleries are provided at Pentax 645D Gallery & Pentax K-5 Gallery.

If you are looking to carry your camera often, you will need to take into account its weight and measurements. The Pentax 645D has exterior measurements of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") and a weight of 1480 grams (3.26 lbs) while the Pentax K-5 has proportions of 131mm x 97mm x 73mm (5.2" x 3.8" x 2.9") with a weight of 740 grams (1.63 lbs).

Check out the Pentax 645D and Pentax K-5 in our brand new Camera & Lens Size Comparison Tool.

Don't forget, the weight of an ILC will differ depending on the lens you have attached during that time. The following is the front view measurements comparison of the 645D compared to the K-5.

Looking at size and weight, the portability grade of the 645D and K-5 is 50 and 60 respectively.

Generally, it's hard to envision the gap in sensor sizing simply by viewing technical specs. The visual here will help offer you a stronger sense of the sensor measurements in the 645D and K-5.

As you have seen, both of the cameras enjoy different megapixel count and different sensor sizing. The 645D due to its bigger sensor will make getting shallower DOF easier and the Pentax 645D will provide you with more detail as a result of its extra 24MP. Higher resolution can also help you crop pictures far more aggressively. The older 645D will be behind when it comes to sensor innovation.