Olympus E-M1 III vs Sony A33

Here, we are looking at the Olympus E-M1 III and Sony A33, former being a Pro Mirrorless while the other is a Entry-Level DSLR by rivals Olympus and Sony. There is a substantial difference among the image resolutions of the E-M1 III (20MP) and A33 (14MP) and the E-M1 III (Four Thirds) and A33 (APS-C) posses totally different sensor measurements.

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The E-M1 III was unveiled 9 years later than the A33 and that is a fairly big difference as far as camera tech is concerned. The two cameras feature different body design with the Olympus E-M1 III being a SLR-style mirrorless camera and the Sony A33 being a Compact SLR camera.

Before going into a detailed comparison, here is a brief synopsis of how the E-M1 III matches up versus the A33 in the way of portability, imaging, features and an overall grade.

This is a sample of the gallery pictures for Olympus OM-D E-M1 Mark III & Sony SLT-A33. The full galleries are available at Olympus E-M1 III Gallery & Sony A33 Gallery.

In case you're planning to lug around your camera frequently, you are going to need to take into account its weight and measurements. The Olympus E-M1 III features external measurements of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") and a weight of 580 grams (1.28 lbs) whilst the Sony A33 has proportions of 124mm x 92mm x 85mm (4.9" x 3.6" x 3.3") with a weight of 500 grams (1.10 lbs).

Contrast the Olympus E-M1 III and Sony A33 in our newest Camera plus Lens Size Comparison Tool.

Always remember, the weight of an ILC will change depending on the lens you select at the time. Here is a front view measurement comparison of the E-M1 III vs the A33.

Using size and weight, the portability grade of the E-M1 III and A33 is 67 and 67 respectively.

Usually, it is hard to visualise the difference in sensor measurements purely by checking out specs. The photograph below might offer you a greater sense of the sensor measurements in the E-M1 III and A33.

As you can plainly see, each of these cameras feature different megapixel count and different sensor measurements. The E-M1 III with its smaller sensor will make achieving shallower depth of field trickier and the Olympus E-M1 III will show greater detail having an extra 6MP. Greater resolution will also help you crop pics way more aggressively. The fresher E-M1 III will have an edge in sensor innovation.