Olympus E-1 vs Pentax K-3

Following is a detailed comparison of the Olympus E-1 versus Pentax K-3, former is a Pro DSLR while the other is a Advanced DSLR by rivals Olympus and Pentax. There is a substantial difference between the sensor resolutions of the E-1 (5MP) and K-3 (24MP) and the E-1 (Four Thirds) and K-3 (APS-C) feature different sensor dimensions.

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The E-1 was launched 11 years prior to the K-3 which is quite a big difference as far as tech is concerned. Each of the cameras come with different body type with the Olympus E-1 being a Large SLR camera and the Pentax K-3 being a Mid-size SLR camera.

Before diving in to a step-by-step comparison, below is a concise introduction of how the E-1 matches up vs the K-3 in the way of portability, imaging, features and an overall score.

Below is a sample of the gallery pictures for Olympus E-1 & Pentax K-3. The complete galleries are viewable at Olympus E-1 Gallery & Pentax K-3 Gallery.

When you are aiming to carry around your camera, you will want to think about its weight and measurements. The Olympus E-1 has exterior measurements of 141mm x 104mm x 81mm (5.6" x 4.1" x 3.2") having a weight of 735 grams (1.62 lbs) while the Pentax K-3 has proportions of 131mm x 100mm x 77mm (5.2" x 3.9" x 3.0") having a weight of 800 grams (1.76 lbs).

Check the Olympus E-1 versus Pentax K-3 in our completely new Camera & Lens Size Comparison Tool.

Do not forget, the weight of an ILC will vary dependant on the lens you are working with at the time. Here is the front view measurements comparison of the E-1 versus the K-3.

Taking into consideration size and weight, the portability score of the E-1 and K-3 is 59 and 59 respectively.

Often, it's tough to visualize the contrast between sensor sizes just by reviewing specifications. The pic below may give you a stronger sense of the sensor sizing in the E-1 and K-3.

Plainly, both cameras posses different megapixel count and different sensor sizes. The E-1 because of its tinier sensor is going to make shooting shallower depth of field more challenging and the Pentax K-3 will offer you extra detail utilizing its extra 19MP. Greater resolution will allow you to crop images somewhat more aggressively. The more aged E-1 is going to be disadvantaged with regard to sensor technology.