Olympus E-400 vs Pentax K-3

Here is a detailed overview of the Olympus E-400 and Pentax K-3, one being a Entry-Level DSLR and the other is a Advanced DSLR by companies Olympus and Pentax. There is a significant difference between the sensor resolutions of the E-400 (10MP) and K-3 (24MP) and the E-400 (Four Thirds) and K-3 (APS-C) boast different sensor sizes.

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The E-400 was manufactured 8 years before the K-3 and that is quite a sizable gap as far as tech is concerned. Each of the cameras have different body design with the Olympus E-400 being a Compact SLR camera and the Pentax K-3 being a Mid-size SLR camera.

Before we go into a step-by-step comparison, here is a simple summary of how the E-400 grades versus the K-3 with regard to portability, imaging, features and an overall rating.

Here is a sample of the gallery pics for Olympus E-400 and Pentax K-3. The entire galleries are viewable at Olympus E-400 Gallery and Pentax K-3 Gallery.

In case you're looking to carry your camera regularly, you're going to have to think about its weight and size. The Olympus E-400 features external measurements of 130mm x 91mm x 53mm (5.1" x 3.6" x 2.1") along with a weight of 435 grams (0.96 lbs) and the Pentax K-3 has specifications of 131mm x 100mm x 77mm (5.2" x 3.9" x 3.0") and a weight of 800 grams (1.76 lbs).

Compare the Olympus E-400 and Pentax K-3 in the all new Camera and Lens Size Comparison Tool.

Take into account, the weight of an Interchangeable Lens Camera will differ based on the lens you use at the time. Below is a front view measurements comparison of the E-400 compared to the K-3.

Taking into consideration size and weight, the portability rating of the E-400 and K-3 is 77 and 59 respectively.

Often, its tough to visualize the contrast between sensor sizing just by checking specifications. The graphic below might give you a much better sense of the sensor measurements in the E-400 and K-3.

To sum up, both cameras provide different resolutions and different sensor sizing. The E-400 due to its tinier sensor is going to make achieving shallow DOF more challenging and the Pentax K-3 will give you greater detail due to its extra 14 Megapixels. Greater resolution can also allow you to crop images more aggressively. The older E-400 is going to be disadvantaged when it comes to sensor technology.