Olympus E-M1 vs Pentax 645Z

Its time to take a deeper look at the Olympus E-M1 versus Pentax 645Z, former is a Pro Mirrorless while the latter is a Pro DSLR by manufacturers Olympus and Pentax. There is a noticeable difference among the resolutions of the E-M1 (16MP) and 645Z (51MP) and the E-M1 (Four Thirds) and 645Z (Medium format) feature different sensor sizes.

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The E-M1 was announced 5 months before the 645Z and they are of a similar age. Each of the cameras offer different body type with the Olympus E-M1 being a SLR-style mirrorless camera and the Pentax 645Z being a Large SLR camera.

Before going in to a comprehensive comparison, below is a simple view of how the E-M1 scores versus the 645Z with regards to portability, imaging, features and an overall mark.

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

If you're aiming to travel with your camera, you will have to factor in its weight and size. The Olympus E-M1 provides exterior dimensions of 130mm x 94mm x 63mm (5.1" x 3.7" x 2.5") having a weight of 497 grams (1.10 lbs) whilst 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).

See the Olympus E-M1 versus Pentax 645Z in our brand new Camera plus Lens Size Comparison Tool.

Keep in mind, the weight of an ILC will vary dependant on the lens you are utilising at that time. Below is the front view proportions comparison of the E-M1 and the 645Z.

Taking into consideration size and weight, the portability grade of the E-M1 and 645Z is 71 and 49 respectively.

Usually, it is difficult to picture the gap in sensor dimensions only by researching specifications. The pic here should offer you a stronger sense of the sensor sizes in the E-M1 and 645Z.

Plainly, both cameras offer different megapixel count and different sensor dimensions. The E-M1 using its smaller sensor is going to make achieving bokeh more challenging and the Pentax 645Z will result in extra detail with its extra 35 Megapixels. Higher resolution will also enable you to crop shots a little more aggressively.