Pentax 645D vs Pentax K-500

Below is a extensive assessment of the Pentax 645D vs Pentax K-500, former being a Pro DSLR while the other is a Entry-Level DSLR and they are both offered by Pentax. There is a sizable difference among the sensor resolutions of the 645D (40MP) and K-500 (16MP) and the 645D (Medium format) and K-500 (APS-C) provide different sensor sizes.

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The 645D was brought out 4 years prior to the K-500 and that is a fairly significant difference as far as camera tech is concerned. Both cameras have different body design with the Pentax 645D being a Large SLR camera and the Pentax K-500 being a Compact SLR camera.

Before getting into a full comparison, here is a simple view of how the 645D scores vs the K-500 when considering portability, imaging, features and an overall grade.

This is a sample of the gallery pictures for Pentax 645D & Pentax K-500. The entire galleries are viewable at Pentax 645D Gallery & Pentax K-500 Gallery.

When you are aiming to lug around your camera, you should take into account its weight and dimensions. The Pentax 645D enjoys outside dimensions 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-500 has dimensions of 130mm x 97mm x 71mm (5.1" x 3.8" x 2.8") along with a weight of 646 grams (1.42 lbs).

Check the Pentax 645D vs Pentax K-500 in our newest Camera & Lens Size Comparison Tool.

Remember, the weight of an ILC will vary depending on the lens you have attached at that moment. The following is a front view overall size comparison of the 645D against the K-500.

Factoring in size and weight, the portability grade of the 645D and K-500 is 50 and 64 respectively.

Oftentimes, it can be hard to picture the gap in sensor measurements simply by seeing technical specs. The photograph underneath might give you a clearer sense of the sensor dimensions in the 645D and K-500.

As you have seen, each of these cameras have different megapixels and different sensor measurements. The 645D due to its larger sensor is going to make achieving shallow depth of field less difficult and the Pentax 645D will show more detail having its extra 24 Megapixels. Greater resolution can also make it easier to crop photos a bit more aggressively. The older 645D will be behind in sensor innovation.