Olympus E-M1 III vs Sony A7 IV

Its time to look much closer at the Olympus E-M1 III versus Sony A7 IV, both Pro Mirrorless cameras by brands Olympus and Sony. There is a significant difference among the sensor resolutions of the E-M1 III (20MP) and A7 IV (33MP) and the E-M1 III (Four Thirds) and A7 IV (Full frame) provide different sensor size.

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The E-M1 III was released 20 months earlier than the A7 IV making them a generation away from each other. Both cameras feature the same body design (SLR-style mirrorless).

Before we go right into a detailed comparison, here is a simple introduction of how the E-M1 III grades against the A7 IV in regards to portability, imaging, features and an overall mark.

Following is a sample of the gallery pictures for Olympus OM-D E-M1 Mark III and Sony Alpha A7 IV. The complete galleries are viewable at Olympus E-M1 III Gallery and Sony A7 IV Gallery.

If you are going to travel with your camera, you will need to take into account its weight and dimensions. The Olympus E-M1 III provides external dimensions of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") along with a weight of 580 grams (1.28 lbs) while the Sony A7 IV has dimensions of 129mm x 97mm x 81mm (5.1" x 3.8" x 3.2") along with a weight of 699 grams (1.54 lbs).

Analyze the Olympus E-M1 III versus Sony A7 IV in the new Camera with Lens Size Comparison Tool.

Remember that, the weight of an Interchangeable Lens Camera will vary dependant on the lens you have chosen at that time. The following is a front view physical size comparison of the E-M1 III and the A7 IV.

Taking into account size and weight, the portability rating of the E-M1 III and A7 IV is 67 and 61 respectively.

Often, it can be difficult to picture the gap in sensor dimensions merely by going through specs. The image below should offer you a better sense of the sensor sizes in the E-M1 III and A7 IV.

All in all, both cameras feature different megapixels and different sensor dimensions. The E-M1 III due to its smaller sensor is going to make achieving shallow depth of field tougher and the Sony A7 IV will provide more detail as a result of its extra 13 Megapixels. Greater resolution will also help you crop images way more aggressively. The more aged E-M1 III will be behind with regard to sensor technology.