Olympus E-M1 III vs Panasonic ZS3

In this article, we will be evaluating the Olympus E-M1 III versus Panasonic ZS3, former being a Pro Mirrorless while the latter is a Small Sensor Superzoom by rivals Olympus and Panasonic. There is a noticeable difference among the resolutions of the E-M1 III (20MP) and ZS3 (10MP) and the E-M1 III (Four Thirds) and ZS3 (1/2.3") possess totally different sensor measurements.

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The E-M1 III was brought out 10 years later than the ZS3 and that is a fairly sizable difference as far as camera tech is concerned. Both of the cameras offer different body type with the Olympus E-M1 III being a SLR-style mirrorless camera and the Panasonic ZS3 being a Compact camera.

Before we go straight into a in-depth comparison, below is a quick synopsis of how the E-M1 III scores against the ZS3 when considering portability, imaging, features and an overall grade.

This is a preview of the gallery images for Olympus OM-D E-M1 Mark III & Panasonic Lumix DMC-ZS3. The entire galleries are provided at Olympus E-M1 III Gallery & Panasonic ZS3 Gallery.

For anybody who is aiming to lug around your camera frequently, you will want to factor its weight and volume. The Olympus E-M1 III comes with external measurements of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") accompanied by a weight of 580 grams (1.28 lbs) while the Panasonic ZS3 has sizing of 103mm x 60mm x 33mm (4.1" x 2.4" x 1.3") with a weight of 229 grams (0.50 lbs).

Compare the Olympus E-M1 III versus Panasonic ZS3 in our completely new Camera & Lens Size Comparison Tool.

Keep in mind, the weight of an ILC will differ depending on the lens you use at the time. Following is the front view physical size comparison of the E-M1 III and the ZS3.

Taking into consideration size and weight, the portability grade of the E-M1 III and ZS3 is 67 and 91 respectively.

Usually, it can be tough to visualise the difference in sensor measurements purely by seeing technical specs. The graphic underneath will offer you a more clear sense of the sensor sizing in the E-M1 III and ZS3.

As you have seen, the 2 cameras enjoy different resolutions and different sensor measurements. The E-M1 III featuring a bigger sensor will make shooting shallow DOF easier and the Olympus E-M1 III will produce more detail having its extra 10MP. Higher resolution can also make it easier to crop shots far more aggressively. The younger E-M1 III is going to have a benefit when it comes to sensor innovation.