Olympus E-300 vs Pentax K-3 III

In this write-up, we will be looking at the Olympus E-300 vs Pentax K-3 III, both Advanced DSLR digital cameras by companies Olympus and Pentax. There is a big difference between the sensor resolutions of the E-300 (8MP) and K-3 III (26MP) and the E-300 (Four Thirds) and K-3 III (APS-C) possess totally different sensor measurements.

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The E-300 was released 17 years earlier than the K-3 III and that is quite a big gap as far as tech is concerned. Each of the cameras offer the identical body type (Mid-size SLR).

Before diving straight into a step-by-step comparison, below is a short overview of how the E-300 scores vs the K-3 III when it comes to portability, imaging, features and an overall rating.

Below is a preview of the gallery images for Olympus E-300 and Pentax K-3 Mark III. The complete galleries are provided at Olympus E-300 Gallery and Pentax K-3 III Gallery.

For those who are going to carry your camera often, you will want to factor in its weight and measurements. The Olympus E-300 comes with physical measurements of 147mm x 85mm x 64mm (5.8" x 3.3" x 2.5") accompanied by a weight of 624 grams (1.38 lbs) whilst the Pentax K-3 III has proportions of 135mm x 104mm x 74mm (5.3" x 4.1" x 2.9") accompanied by a weight of 820 grams (1.81 lbs).

See the Olympus E-300 vs Pentax K-3 III in the all new Camera and Lens Size Comparison Tool.

Don't forget, the weight of an Interchangeable Lens Camera will change depending on the lens you are working with at that moment. Underneath is the front view size comparison of the E-300 against the K-3 III.

Taking into account size and weight, the portability score of the E-300 and K-3 III is 67 and 58 respectively.

Usually, it's tough to see the gap between sensor sizing only by checking specifications. The visual underneath should give you a clearer sense of the sensor sizing in the E-300 and K-3 III.

To sum up, both the cameras offer different megapixels and different sensor sizing. The E-300 because of its tinier sensor will make shooting shallow DOF tougher and the Pentax K-3 III will give greater detail as a result of its extra 18MP. Higher resolution will let you crop photographs a little more aggressively. The older E-300 is going to be disadvantaged in sensor tech.