Olympus E-400 vs Sony A9

Below, we are comparing the Olympus E-400 vs Sony A9, one being a Entry-Level DSLR and the other is a Pro Mirrorless by brands Olympus and Sony. There is a huge difference between the image resolutions of the E-400 (10MP) and A9 (24MP) and the E-400 (Four Thirds) and A9 (Full frame) enjoy different sensor sizing.

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The E-400 was revealed 11 years earlier than the A9 and that is quite a significant gap as far as tech is concerned. Each of the cameras come with different body type with the Olympus E-400 being a Compact SLR camera and the Sony A9 being a SLR-style mirrorless camera.

Before going straight into a more detailed comparison, below is a brief summary of how the E-400 grades vs the A9 in terms of portability, imaging, features and an overall rating.

This is a sample of the gallery pics for Olympus E-400 and Sony Alpha A9. The full galleries are provided at Olympus E-400 Gallery and Sony A9 Gallery.

If you are looking to carry your camera regularly, you will have to factor its weight and size. The Olympus E-400 has outside 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 Sony A9 has specifications of 127mm x 96mm x 63mm (5.0" x 3.8" x 2.5") accompanied by a weight of 673 grams (1.48 lbs).

See the Olympus E-400 vs Sony A9 in the latest Camera and Lens Size Comparison Tool.

Take into consideration, the weight of an Interchangeable Lens Camera will change depending on the lens you are employing during that time. Below is the front view physical size comparison of the E-400 vs the A9.

Considering size and weight, the portability grade of the E-400 and A9 is 77 and 65 respectively.

Oftentimes, it is difficult to imagine the contrast between sensor sizing just by reviewing a spec sheet. The visual here may offer you a stronger sense of the sensor measurements in the E-400 and A9.

As you can see, both of those cameras posses different resolutions and different sensor sizing. The E-400 with its tinier sensor is going to make achieving shallower DOF more challenging and the Sony A9 will deliver greater detail because of its extra 14MP. Greater resolution can also let you crop photos somewhat more aggressively. The older E-400 is going to be disadvantaged with regard to sensor technology.