Olympus E-400 vs Pentax 645D

In this write-up, we will be analyzing the Olympus E-400 vs Pentax 645D, one being a Entry-Level DSLR and the latter is a Pro DSLR by manufacturers Olympus and Pentax. There is a crucial difference between the resolutions of the E-400 (10MP) and 645D (40MP) and the E-400 (Four Thirds) and 645D (Medium format) possess totally different sensor measurements.

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The E-400 was unveiled 4 years earlier than the 645D and that is quite a serious gap as far as tech is concerned. Both cameras offer different body type with the Olympus E-400 being a Compact SLR camera and the Pentax 645D being a Large SLR camera.

Before diving straight into a detailed comparison, below is a concise summary of how the E-400 matches up versus the 645D with respect to portability, imaging, features and an overall grade.

Here is a preview of the gallery images for Olympus E-400 and Pentax 645D. The full galleries are available at Olympus E-400 Gallery and Pentax 645D Gallery.

If you're aiming to lug around your camera, you will want to take into account its weight and proportions. The Olympus E-400 comes with outside dimensions of 130mm x 91mm x 53mm (5.1" x 3.6" x 2.1") and a weight of 435 grams (0.96 lbs) and the Pentax 645D has measurements of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") having a weight of 1480 grams (3.26 lbs).

Contrast the Olympus E-400 vs Pentax 645D in the all new Camera with Lens Size Comparison Tool.

Remember, the weight of an Interchangeable Lens Camera will differ based on the lens you are working with at that time. Following is the front view size comparison of the E-400 vs the 645D.

Taking into consideration size and weight, the portability grade of the E-400 and 645D is 77 and 50 respectively.

In many cases, it is very difficult to see the contrast between sensor measurements only by checking specs. The graphic below will offer you a more clear sense of the sensor sizes in the E-400 and 645D.

As you can plainly see, the two cameras offer different megapixels and different sensor measurements. The E-400 with its tinier sensor will make achieving shallower depth of field trickier and the Pentax 645D will give extra detail having an extra 30MP. Higher resolution will let you crop photographs a little more aggressively. The older E-400 is going to be disadvantaged when it comes to sensor innovation.