Leica M9 vs Sony A7S III

Let's look closer at the Leica M9 versus Sony A7S III, both Pro Mirrorless digital cameras by competitors Leica and Sony. There exists a big gap between the resolutions of the M9 (18MP) and A7S III (12MP) but they enjoy the same exact sensor sizes (Full frame).

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The M9 was launched 12 years before the A7S III and that is quite a big gap as far as technology is concerned. Both the cameras offer different body type with the Leica M9 being a Rangefinder-style mirrorless camera and the Sony A7S III being a SLR-style mirrorless camera.

Before diving through a detailed comparison, below is a simple overview of how the M9 scores against the A7S III with respect to portability, imaging, features and an overall grade.

The following is a preview of the gallery images for Leica M9 and Sony Alpha A7S III. The complete galleries are viewable at Leica M9 Gallery and Sony A7S III Gallery.

For anybody who is looking to lug around your camera often, you will want to think about its weight and dimensions. The Leica M9 provides exterior dimensions of 139mm x 80mm x 37mm (5.5" x 3.1" x 1.5") accompanied by a weight of 585 grams (1.29 lbs) and the Sony A7S III has dimensions of 129mm x 97mm x 81mm (5.1" x 3.8" x 3.2") accompanied by a weight of 699 grams (1.54 lbs).

See the Leica M9 versus Sony A7S III in the new Camera and Lens Size Comparison Tool.

Take into account, the weight of an Interchangeable Lens Camera will differ based on the lens you are utilising during that time. Following is the front view dimension comparison of the M9 vs the A7S III.

Taking into account dimensions and weight, the portability score of the M9 and A7S III is 79 and 61 respectively.

Normally, it's difficult to imagine the gap between sensor measurements merely by going over specs. The graphic here will help provide you a better sense of the sensor dimensions in the M9 and A7S III.

As you can plainly see, both cameras offer the same exact sensor sizing albeit different MP. You should expect the Leica M9 to deliver extra detail utilizing its extra 6MP. Higher resolution can also let you crop pictures a little more aggressively. The older M9 is going to be disadvantaged when it comes to sensor technology.