Pentax 645D vs Pentax K-5 IIs

Let's look a little more closely at the Pentax 645D vs Pentax K-5 IIs, one is a Pro DSLR and the other is a Advanced DSLR and both are built by Pentax. There exists a sizeable gap between the sensor resolutions of the 645D (40MP) and K-5 IIs (16MP) and the 645D (Medium format) and K-5 IIs (APS-C) offer totally different sensor measurements.

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The 645D was revealed 4 years before the K-5 IIs which is quite a large gap as far as technology is concerned. Each of these cameras have different body design with the Pentax 645D being a Large SLR camera and the Pentax K-5 IIs being a Mid-size SLR camera.

Before delving right into a more detailed comparison, here is a simple highlight of how the 645D matches up versus the K-5 IIs in the way of portability, imaging, features and an overall mark.

The following is a sample of the gallery pictures for Pentax 645D and Pentax K-5 IIs. The full galleries are viewable at Pentax 645D Gallery and Pentax K-5 IIs Gallery.

For those who are aiming to travel with your camera, you need to think about its weight and dimensions. The Pentax 645D comes with outer measurements of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") accompanied by a weight of 1480 grams (3.26 lbs) and the Pentax K-5 IIs has dimensions of 131mm x 97mm x 73mm (5.2" x 3.8" x 2.9") along with a weight of 760 grams (1.68 lbs).

Contrast the Pentax 645D vs Pentax K-5 IIs in the latest Camera with Lens Size Comparison Tool.

Bear in mind, the weight of an Interchangeable Lens Camera will vary dependant on the lens you have attached at that moment. The following is a front view proportions comparison of the 645D against the K-5 IIs.

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

Typically, it's tough to see the contrast between sensor dimensions purely by checking specifications. The image below should give you a more clear sense of the sensor sizing in the 645D and K-5 IIs.

Plainly, each of the cameras provide different megapixels and different sensor dimensions. The 645D using its larger sensor will make achieving shallow DOF easier and the Pentax 645D will give you extra detail because of its extra 24 Megapixels. Greater resolution can also enable you to crop photos more aggressively. The more aged 645D is going to be behind when it comes to sensor innovation.