Olympus E-PM1 vs Pentax 645D

Let's look a little more closely at the Olympus E-PM1 vs Pentax 645D, former is a Entry-Level 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-PM1 (12MP) and 645D (40MP) and the E-PM1 (Four Thirds) and 645D (Medium format) possess different sensor sizing.

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The E-PM1 was released 21 months after the 645D making the cameras a generation away from one another. Both the cameras come with different body type with the Olympus E-PM1 being a Rangefinder-style mirrorless camera and the Pentax 645D being a Large SLR camera.

Before delving through a more detailed comparison, below is a brief overview of how the E-PM1 grades versus the 645D for portability, imaging, features and an overall score.

Below is a sample of the gallery pics for Olympus PEN E-PM1 & Pentax 645D. The complete galleries are provided at Olympus E-PM1 Gallery & Pentax 645D Gallery.

When you are aiming to carry around your camera, you will have to factor in its weight and measurements. The Olympus E-PM1 comes with outer dimensions of 110mm x 64mm x 34mm (4.3" x 2.5" x 1.3") and a weight of 265 grams (0.58 lbs) while the Pentax 645D has proportions of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") with a weight of 1480 grams (3.26 lbs).

Take a look at the Olympus E-PM1 vs Pentax 645D in our completely new Camera plus Lens Size Comparison Tool.

Remember that, the weight of an ILC will vary dependant on the lens you are using at that moment. The following is the front view overall size comparison of the E-PM1 against the 645D.

Using dimensions and weight, the portability grade of the E-PM1 and 645D is 89 and 50 respectively.

Typically, it is very tough to visualize the contrast between sensor sizes just by looking at specifications. The image underneath should offer you a clearer sense of the sensor sizes in the E-PM1 and 645D.

Plainly, both of these cameras have got different resolutions and different sensor sizes. The E-PM1 due to its tinier sensor is going to make achieving shallower DOF harder and the Pentax 645D will resolve more detail as a result of its extra 28MP. Greater resolution will let you crop images much more aggressively. The more recent E-PM1 should have a benefit with regard to sensor tech.