Olympus E-M1X vs Pentax 645D

In this write-up, we are evaluating the Olympus E-M1X vs Pentax 645D, former is a Pro Mirrorless while the other is a Pro DSLR by competitors Olympus and Pentax. There exists a considerable gap between the sensor resolutions of the E-M1X (20MP) and 645D (40MP) and the E-M1X (Four Thirds) and 645D (Medium format) feature totally different sensor size.

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The E-M1X was revealed 9 years after the 645D which is quite a large difference as far as technology is concerned. Both of these cameras offer different body type with the Olympus E-M1X being a SLR-style mirrorless camera and the Pentax 645D being a Large SLR camera.

Before getting through a complete comparison, below is a brief view of how the E-M1X matches up against the 645D in terms of portability, imaging, features and an overall mark.

Following is a sample of the gallery pics for Olympus OM-D E-M1X & Pentax 645D. The full galleries are available at Olympus E-M1X Gallery & Pentax 645D Gallery.

In case you're looking to travel with your camera often, you will need to factor in its weight and measurements. The Olympus E-M1X enjoys outside measurements of 144mm x 147mm x 75mm (5.7" x 5.8" x 3.0") along with a weight of 997 grams (2.20 lbs) while the Pentax 645D has proportions of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") along with a weight of 1480 grams (3.26 lbs).

Contrast the Olympus E-M1X vs Pentax 645D in our completely new Camera plus Lens Size Comparison Tool.

Remember, the weight of an ILC will vary dependant on the lens you are using during that time. Underneath is the front view dimension comparison of the E-M1X versus the 645D.

Using dimensions and weight, the portability rating of the E-M1X and 645D is 54 and 50 respectively.

Sometimes, its tough to see the difference between sensor dimensions purely by reading through specs. The image here may provide you a clearer sense of the sensor measurements in the E-M1X and 645D.

As you can plainly see, both of the cameras offer different megapixel count and different sensor dimensions. The E-M1X having a tinier sensor will make shooting shallower depth of field more challenging and the Pentax 645D will give extra detail because of its extra 20MP. Greater resolution can also let you crop pics a little more aggressively. The younger E-M1X is going to have an edge when it comes to sensor tech.