Olympus E-M1 vs Pentax K20D

Below is a comprehensive assessment of the Olympus E-M1 versus Pentax K20D, one being a Pro Mirrorless and the other is a Advanced DSLR by companies Olympus and Pentax. The sensor resolution of the E-M1 (16MP) and the K20D (15MP) is fairly comparable but the E-M1 (Four Thirds) and K20D (APS-C) use different sensor size.

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The E-M1 was unveiled 5 years later than the K20D and that is a fairly sizable gap as far as camera technology is concerned. Both of the cameras come with different body type with the Olympus E-M1 being a SLR-style mirrorless camera and the Pentax K20D being a Mid-size SLR camera.

Before getting in to a detailed comparison, below is a quick view of how the E-M1 grades versus the K20D in regards to portability, imaging, features and an overall grade.

Following is a sample of the gallery pictures for Olympus OM-D E-M1 and Pentax K20D. The full galleries are available at Olympus E-M1 Gallery and Pentax K20D Gallery.

If you are aiming to lug around your camera frequently, you'll have to take into account its weight and volume. The Olympus E-M1 features physical measurements of 130mm x 94mm x 63mm (5.1" x 3.7" x 2.5") with a weight of 497 grams (1.10 lbs) whilst the Pentax K20D has sizing of 142mm x 101mm x 70mm (5.6" x 4.0" x 2.8") with a weight of 800 grams (1.76 lbs).

Examine the Olympus E-M1 versus Pentax K20D in the all new Camera with Lens Size Comparison Tool.

Take into consideration, the weight of an Interchangeable Lens Camera will change dependant on the lens you are using at that time. The following is the front view sizing comparison of the E-M1 against the K20D.

Taking into account dimensions and weight, the portability rating of the E-M1 and K20D is 71 and 59 respectively.

More often than not, it is very tough to imagine the gap in sensor measurements merely by checking out a spec sheet. The visual underneath may give you a clearer sense of the sensor measurements in the E-M1 and K20D.

Clearly, both of the cameras posses different megapixels and different sensor measurements. The E-M1 with its smaller sensor is going to make shooting shallow depth of field tougher and the Olympus E-M1 will provide extra detail having an extra 1 Megapixels. Greater resolution will also enable you to crop photos somewhat more aggressively. The more recent E-M1 provides an advantage with regard to sensor innovation.