Sony A7 III vs Sony FX3

Following is a in depth analysis of the Sony A7 III versus Sony FX3, both Pro Mirrorless cameras and both of them are sold by Sony. There exists a large gap among the image resolutions of the A7 III (24MP) and FX3 (12MP) but both cameras provide the same sensor dimensions (Full frame).

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The A7 III was introduced 4 years before the FX3 which is a fairly serious difference as far as camera technology is concerned. Each of the cameras have different body design with the Sony A7 III being a SLR-style mirrorless camera and the Sony FX3 being a Rangefinder-style mirrorless camera.

Before delving straight to a step-by-step comparison, here is a short overview of how the A7 III grades vs the FX3 with regard to portability, imaging, features and an overall score.

Here is a preview of the gallery photos for Sony Alpha A7 III & Sony FX3. The whole galleries are available at Sony A7 III Gallery & Sony FX3 Gallery.

When you are going to carry around your camera often, you need to factor its weight and volume. The Sony A7 III offers exterior dimensions of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") having a weight of 650 grams (1.43 lbs) whilst the Sony FX3 has sizing of 130mm x 78mm x 85mm (5.1" x 3.1" x 3.3") having a weight of 716 grams (1.58 lbs).

Look at the Sony A7 III versus Sony FX3 in our completely new Camera & Lens Size Comparison Tool.

Remember that, the weight of an ILC will differ depending on the lens you are utilizing at the time. The following is a front view scale comparison of the A7 III compared to the FX3.

Considering dimensions and weight, the portability rating of the A7 III and FX3 is 63 and 62 respectively.

More often than not, it's difficult to visualise the difference in sensor sizes only by going through a spec sheet. The pic here should give you a stronger sense of the sensor dimensions in the A7 III and FX3.

As you can see, both of the cameras provide the same sensor dimensions albeit not the same megapixels. You can count on the Sony A7 III to show greater detail using its extra 12MP. Higher resolution will also help you crop pictures more aggressively. The more aged A7 III will be behind when it comes to sensor technology.