Olympus E-M1 II vs Pentax 645Z

Below, we will be comparing the Olympus E-M1 II vs Pentax 645Z, former is a Pro Mirrorless while the latter is a Pro DSLR by brands Olympus and Pentax. There is a considerable difference among the sensor resolutions of the E-M1 II (20MP) and 645Z (51MP) and the E-M1 II (Four Thirds) and 645Z (Medium format) feature different sensor measurements.

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The E-M1 II was manufactured 2 years after the 645Z which is a fairly large difference as far as camera tech is concerned. The two cameras come with different body type with the Olympus E-M1 II being a SLR-style mirrorless camera and the Pentax 645Z being a Large SLR camera.

Before getting through a in-depth comparison, below is a concise introduction of how the E-M1 II matches up vs the 645Z when considering portability, imaging, features and an overall score.

Here is a preview of the gallery photos for Olympus OM-D E-M1 Mark II & Pentax 645Z. The entire galleries are viewable at Olympus E-M1 II Gallery & Pentax 645Z Gallery.

If you are planning to carry around your camera, you have to factor its weight and dimensions. The Olympus E-M1 II features external dimensions of 134mm x 91mm x 67mm (5.3" x 3.6" x 2.6") and a weight of 574 grams (1.27 lbs) while the Pentax 645Z has dimensions of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") and a weight of 1550 grams (3.42 lbs).

Examine the Olympus E-M1 II vs Pentax 645Z in our brand new Camera & Lens Size Comparison Tool.

Bear in mind, the weight of an ILC will differ dependant on the lens you select at the time. Here is the front view scale comparison of the E-M1 II versus the 645Z.

Using size and weight, the portability score of the E-M1 II and 645Z is 68 and 49 respectively.

Often, its tough to picture the difference in sensor sizes only by looking through a spec sheet. The image below might provide you a more clear sense of the sensor dimensions in the E-M1 II and 645Z.

Clearly, the 2 cameras posses different megapixel count and different sensor sizes. The E-M1 II because of its smaller sensor is going to make shooting shallow depth of field tougher and the Pentax 645Z will render more detail due to its extra 31 Megapixels. Higher resolution can also enable you to crop pictures somewhat more aggressively. The younger E-M1 II provides a benefit in sensor tech.