Olympus E-M10 III vs Pentax 645Z

Below is a comprehensive overview of the Olympus E-M10 III vs Pentax 645Z, former being a Entry-Level Mirrorless while the other is a Pro DSLR by manufacturers Olympus and Pentax. There is a considerable difference between the resolutions of the E-M10 III (16MP) and 645Z (51MP) and the E-M10 III (Four Thirds) and 645Z (Medium format) provide different sensor size.

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The E-M10 III was introduced 3 years later than the 645Z and that is quite a large difference as far as tech is concerned. Both of the cameras have different body design with the Olympus E-M10 III being a SLR-style mirrorless camera and the Pentax 645Z being a Large SLR camera.

Before delving into a complete comparison, here is a brief summation of how the E-M10 III scores versus the 645Z in regards to portability, imaging, features and an overall grade.

This is a sample of the gallery pictures for Olympus OM-D E-M10 Mark III & Pentax 645Z. The whole galleries are viewable at Olympus E-M10 III Gallery & Pentax 645Z Gallery.

For anyone who is intending to lug around your camera regularly, you will need to factor in its weight and size. The Olympus E-M10 III offers physical dimensions of 122mm x 84mm x 50mm (4.8" x 3.3" x 2.0") having a weight of 410 grams (0.90 lbs) and the Pentax 645Z has specifications of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") having a weight of 1550 grams (3.42 lbs).

Compare the Olympus E-M10 III vs Pentax 645Z in our newest Camera & Lens Size Comparison Tool.

Take into consideration, the weight of an ILC will differ based on the lens you have chosen at that time. Here is a front view measurements comparison of the E-M10 III compared to the 645Z.

Looking at size and weight, the portability rating of the E-M10 III and 645Z is 80 and 49 respectively.

Generally, it's hard to picture the gap between sensor measurements just by reviewing specs. The graphic here will offer you a stronger sense of the sensor sizes in the E-M10 III and 645Z.

As you can plainly see, both of these cameras have different megapixels and different sensor measurements. The E-M10 III having a tinier sensor is going to make shooting shallow DOF tougher and the Pentax 645Z will offer extra detail using its extra 35MP. Greater resolution can also help you crop photos a bit more aggressively. The more modern E-M10 III provides an edge in sensor tech.