Olympus E-M5 vs Pentax 645D

Here is a thorough analysis of the Olympus E-M5 vs Pentax 645D, one being a Advanced Mirrorless and the latter is a Pro DSLR by companies Olympus and Pentax. There exists a crucial gap among the image resolutions of the E-M5 (16MP) and 645D (40MP) and the E-M5 (Four Thirds) and 645D (Medium format) provide totally different sensor size.

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The E-M5 was released 2 years later than the 645D and that is a fairly serious gap as far as camera technology is concerned. Each of these cameras have different body design with the Olympus E-M5 being a SLR-style mirrorless camera and the Pentax 645D being a Large SLR camera.

Before getting into a thorough comparison, here is a brief summation of how the E-M5 grades vs the 645D for portability, imaging, features and an overall rating.

Below is a preview of the gallery images for Olympus OM-D E-M5 and Pentax 645D. The complete galleries are available at Olympus E-M5 Gallery and Pentax 645D Gallery.

When you are intending to carry your camera regularly, you will have to consider its weight and dimensions. The Olympus E-M5 enjoys exterior dimensions of 122mm x 89mm x 43mm (4.8" x 3.5" x 1.7") accompanied by a weight of 425 grams (0.94 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).

Examine the Olympus E-M5 vs Pentax 645D in the new Camera and Lens Size Comparison Tool.

Take into account, the weight of an Interchangeable Lens Camera will change depending on the lens you are utilizing at the time. Following is a front view measurement comparison of the E-M5 versus the 645D.

Taking into account dimensions and weight, the portability grade of the E-M5 and 645D is 81 and 50 respectively.

Sometimes, it's hard to visualise the difference in sensor sizing only by viewing technical specs. The photograph here might offer you a better sense of the sensor dimensions in the E-M5 and 645D.

As you can tell, the two cameras provide different megapixels and different sensor sizing. The E-M5 because of its smaller sensor will make shooting shallower DOF more difficult and the Pentax 645D will provide you with greater detail as a result of its extra 24 Megapixels. Higher resolution can also allow you to crop pictures more aggressively. The fresher E-M5 is going to have an edge with regard to sensor technology.