Olympus E-M1 III vs Pentax K20D

Following is a extended overview of the Olympus E-M1 III versus Pentax K20D, one is a Pro Mirrorless and the other is a Advanced DSLR by rivals Olympus and Pentax. There is a huge difference between the image resolutions of the E-M1 III (20MP) and K20D (15MP) and the E-M1 III (Four Thirds) and K20D (APS-C) enjoy totally different sensor sizing.

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The E-M1 III was launched 11 years after the K20D which is quite a significant gap as far as tech is concerned. Both of the cameras offer different body type with the Olympus E-M1 III being a SLR-style mirrorless camera and the Pentax K20D being a Mid-size SLR camera.

Before delving straight into a comprehensive comparison, below is a simple introduction of how the E-M1 III matches up vs the K20D with respect to portability, imaging, features and an overall score.

This is a sample of the gallery pics for Olympus OM-D E-M1 Mark III and Pentax K20D. The complete galleries are available at Olympus E-M1 III Gallery and Pentax K20D Gallery.

For anyone who is planning to carry around your camera regularly, you'll need to factor its weight and proportions. The Olympus E-M1 III comes with physical measurements of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") along with a weight of 580 grams (1.28 lbs) while the Pentax K20D has measurements of 142mm x 101mm x 70mm (5.6" x 4.0" x 2.8") with a weight of 800 grams (1.76 lbs).

Contrast the Olympus E-M1 III versus Pentax K20D in the all new Camera and Lens Size Comparison Tool.

Take into consideration, the weight of an Interchangeable Lens Camera will differ depending on the lens you have attached at that time. Following is the front view measurement comparison of the E-M1 III vs the K20D.

Factoring in size and weight, the portability grade of the E-M1 III and K20D is 67 and 59 respectively.

Often, it is tough to visualise the gap between sensor sizes merely by going over specifications. The image underneath will help give you a greater sense of the sensor sizing in the E-M1 III and K20D.

Plainly, both of those cameras enjoy different resolutions and different sensor sizes. The E-M1 III featuring a tinier sensor will make getting shallower DOF harder and the Olympus E-M1 III will offer greater detail utilizing its extra 5MP. Greater resolution will allow you to crop images far more aggressively. The newer E-M1 III will have an advantage when it comes to sensor innovation.