Canon 1D X vs Pentax 645D

Following is a extensive analysis of the Canon 1D X and Pentax 645D, both Pro DSLR cameras by rivals Canon and Pentax. There exists a crucial gap among the resolutions of the 1D X (18MP) and 645D (40MP) and the 1D X (Full frame) and 645D (Medium format) posses different sensor dimensions.

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The 1D X was introduced 20 months after the 645D which makes them a generation away from one another. Both cameras have the same body design (Large SLR).

Before diving straight to a full comparison, here is a brief introduction of how the 1D X grades against the 645D with regards to portability, imaging, features and an overall score.

This is a preview of the gallery photos for Canon EOS-1D X and Pentax 645D. The whole galleries are available at Canon 1D X Gallery and Pentax 645D Gallery.

For those who are aiming to carry around your camera frequently, you'll have to think about its weight and dimensions. The Canon 1D X provides exterior dimensions of 158mm x 164mm x 83mm (6.2" x 6.5" x 3.3") with a weight of 1340 grams (2.95 lbs) whilst the Pentax 645D has 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).

See the Canon 1D X and Pentax 645D in the latest Camera and Lens Size Comparison Tool.

Bear in mind, the weight of an Interchangeable Lens Camera will vary dependant on the lens you have attached during that time. Underneath is a front view scale comparison of the 1D X compared to the 645D.

Looking at dimensions and weight, the portability score of the 1D X and 645D is 50 and 50 respectively.

Typically, it's hard to picture the gap in sensor sizes purely by viewing a spec sheet. The picture here will help give you a clearer sense of the sensor sizes in the 1D X and 645D.

Clearly, both of those cameras have different megapixels and different sensor sizes. The 1D X having a smaller sensor is going to make shooting shallower DOF more challenging and the Pentax 645D will render greater detail using its extra 22MP. Higher resolution will help you crop shots a bit more aggressively. The younger 1D X should have an advantage in sensor technology.