Leica M9 vs Sony A7 IV

Here, we are evaluating the Leica M9 versus Sony A7 IV, both Pro Mirrorless cameras by companies Leica and Sony. There exists a considerable gap among the sensor resolutions of the M9 (18MP) and A7 IV (33MP) but both cameras provide the identical sensor sizing (Full frame).

Photography Glossary

The M9 was unveiled 13 years prior to the A7 IV which is a fairly large difference as far as camera technology is concerned. Both the cameras feature different body design with the Leica M9 being a Rangefinder-style mirrorless camera and the Sony A7 IV being a SLR-style mirrorless camera.

Before going into a more detailed comparison, here is a quick summary of how the M9 grades versus the A7 IV in terms of portability, imaging, features and an overall score.

The following is a sample of the gallery pics for Leica M9 & Sony Alpha A7 IV. The full galleries are provided at Leica M9 Gallery & Sony A7 IV Gallery.

In case you're planning to carry around your camera often, you will need to take into account its weight and dimensions. The Leica M9 offers exterior dimensions of 139mm x 80mm x 37mm (5.5" x 3.1" x 1.5") and a weight of 585 grams (1.29 lbs) while the Sony A7 IV has dimensions of 129mm x 97mm x 81mm (5.1" x 3.8" x 3.2") and a weight of 699 grams (1.54 lbs).

Look at the Leica M9 versus Sony A7 IV in our newest Camera plus Lens Size Comparison Tool.

Don't forget, the weight of an ILC will change dependant on the lens you are employing at that time. Following is a front view measurements comparison of the M9 vs the A7 IV.

Looking at dimensions and weight, the portability grade of the M9 and A7 IV is 79 and 61 respectively.

Normally, it is very hard to visualise the difference in sensor sizes purely by going through technical specs. The image here will offer you a better sense of the sensor sizes in the M9 and A7 IV.

As you have seen, both of those cameras feature the identical sensor size but not the same MP. You can expect to see the Sony A7 IV to show more detail having an extra 15 Megapixels. Greater resolution will let you crop photos way more aggressively. The more aged M9 will be behind with regard to sensor innovation.