Olympus E-M1 III vs Pentax 645D

Below, we will be analyzing the Olympus E-M1 III and Pentax 645D, one being a Pro Mirrorless and the latter is a Pro DSLR by manufacturers Olympus and Pentax. There is a crucial difference among the resolutions of the E-M1 III (20MP) and 645D (40MP) and the E-M1 III (Four Thirds) and 645D (Medium format) possess totally different sensor size.

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The E-M1 III was released 10 years later than the 645D and that is a fairly serious gap as far as camera tech is concerned. Both of these cameras come with different body type with the Olympus E-M1 III being a SLR-style mirrorless camera and the Pentax 645D being a Large SLR camera.

Before going straight into a thorough comparison, below is a concise view of how the E-M1 III grades vs the 645D in regards to portability, imaging, features and an overall grade.

Following is a preview of the gallery photos for Olympus OM-D E-M1 Mark III and Pentax 645D. The complete galleries are available at Olympus E-M1 III Gallery and Pentax 645D Gallery.

For anybody who is planning to lug around your camera often, you should think about its weight and dimensions. The Olympus E-M1 III features exterior measurements of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") with a weight of 580 grams (1.28 lbs) whilst the Pentax 645D has dimensions of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") and a weight of 1480 grams (3.26 lbs).

Look at the Olympus E-M1 III and Pentax 645D in the new Camera and Lens Size Comparison Tool.

Take into account, the weight of an Interchangeable Lens Camera will differ depending on the lens you select during that time. Here is the front view proportions comparison of the E-M1 III vs the 645D.

Taking into consideration size and weight, the portability grade of the E-M1 III and 645D is 67 and 50 respectively.

Usually, its hard to envision the difference in sensor measurements only by seeing specifications. The visual here may provide you a greater sense of the sensor sizing in the E-M1 III and 645D.

Plainly, the two cameras have got different resolutions and different sensor measurements. The E-M1 III featuring a smaller sensor will make shooting bokeh more difficult and the Pentax 645D will produce extra detail as a result of its extra 20 Megapixels. Higher resolution will allow you to crop pictures much more aggressively. The younger E-M1 III will have an edge with regard to sensor innovation.