Olympus E-PM1 vs Sony A7R IV

Here is a detailed review of the Olympus E-PM1 versus Sony A7R IV, former being a Entry-Level Mirrorless while the other is a Pro Mirrorless by manufacturers Olympus and Sony. There is a considerable difference among the resolutions of the E-PM1 (12MP) and A7R IV (61MP) and the E-PM1 (Four Thirds) and A7R IV (Full frame) come with different sensor sizing.

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The E-PM1 was introduced 8 years before the A7R IV and that is a fairly large difference as far as camera tech is concerned. Both cameras come with different body type with the Olympus E-PM1 being a Rangefinder-style mirrorless camera and the Sony A7R IV being a SLR-style mirrorless camera.

Before we go through a in depth comparison, below is a short synopsis of how the E-PM1 grades versus the A7R IV in terms of portability, imaging, features and an overall rating.

This is a sample of the gallery pictures for Olympus PEN E-PM1 & Sony Alpha A7R IV. The whole galleries are provided at Olympus E-PM1 Gallery & Sony A7R IV Gallery.

If you're looking to carry your camera frequently, you need to consider its weight and volume. The Olympus E-PM1 features physical measurements of 110mm x 64mm x 34mm (4.3" x 2.5" x 1.3") along with a weight of 265 grams (0.58 lbs) whilst the Sony A7R IV has sizing of 129mm x 96mm x 78mm (5.1" x 3.8" x 3.1") with a weight of 665 grams (1.47 lbs).

Contrast the Olympus E-PM1 versus Sony A7R IV in our completely new Camera & Lens Size Comparison Tool.

Remember, the weight of an ILC will vary based on the lens you choose at that time. Underneath is the front view measurement comparison of the E-PM1 versus the A7R IV.

Looking at size and weight, the portability score of the E-PM1 and A7R IV is 89 and 62 respectively.

Usually, it is hard to picture the gap in sensor sizing purely by checking out technical specs. The photograph below will give you a greater sense of the sensor sizing in the E-PM1 and A7R IV.

As you can tell, the 2 cameras posses different megapixel count and different sensor sizing. The E-PM1 with its smaller sensor is going to make shooting shallow DOF harder and the Sony A7R IV will produce more detail using its extra 49MP. Greater resolution can also allow you to crop photos somewhat more aggressively. The older E-PM1 will be behind in sensor innovation.