Leica M-Monochrom vs Sony A7S III

Here is a extended review of the Leica M-Monochrom and Sony A7S III, both Pro Mirrorless digital cameras by competitors Leica and Sony. There is a big difference between the sensor resolutions of the M-Monochrom (18MP) and A7S III (12MP) but they possess the same exact sensor sizing (Full frame).

Photography Glossary

The M-Monochrom was announced 9 years before the A7S III and that is quite a big gap as far as tech is concerned. Each of these cameras offer different body type with the Leica M-Monochrom being a Rangefinder-style mirrorless camera and the Sony A7S III being a SLR-style mirrorless camera.

Before diving straight into a in depth comparison, below is a brief synopsis of how the M-Monochrom matches up versus the A7S III with respect to portability, imaging, features and an overall rating.

Below is a sample of the gallery pictures for Leica M-Monochrom and Sony Alpha A7S III. The whole galleries are available at Leica M-Monochrom Gallery and Sony A7S III Gallery.

For anyone who is looking to carry your camera frequently, you're going to have to think about its weight and measurements. The Leica M-Monochrom has outer dimensions of 139mm x 80mm x 37mm (5.5" x 3.1" x 1.5") along with a weight of 600 grams (1.32 lbs) whilst the Sony A7S III has proportions of 129mm x 97mm x 81mm (5.1" x 3.8" x 3.2") having a weight of 699 grams (1.54 lbs).

Look at the Leica M-Monochrom and Sony A7S III in the all new Camera with Lens Size Comparison Tool.

Keep in mind, the weight of an Interchangeable Lens Camera will vary dependant on the lens you are working with during that time. Below is the front view over all size comparison of the M-Monochrom compared to the A7S III.

Considering size and weight, the portability rating of the M-Monochrom and A7S III is 78 and 61 respectively.

In many cases, it is tough to visualise the gap between sensor sizing only by checking specs. The graphic underneath will give you a much better sense of the sensor sizes in the M-Monochrom and A7S III.

All in all, both of those cameras enjoy the same exact sensor sizing but not the same MP. You should anticipate the Leica M-Monochrom to give you more detail with its extra 6 Megapixels. Greater resolution can also make it easier to crop pics far more aggressively. The older M-Monochrom is going to be disadvantaged in sensor technology.