Sony A7S III vs Sony A99

Let's look more in depth at the Sony A7S III versus Sony A99, former being a Pro Mirrorless while the other is a Advanced DSLR and both are designed by Sony. There is a noticeable difference among the resolutions of the A7S III (12MP) and A99 (24MP) but both cameras offer the same sensor sizing (Full frame).

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The A7S III was brought out 7 years later than the A99 and that is a fairly sizable difference as far as camera tech is concerned. Both of these cameras have different body design with the Sony A7S III being a SLR-style mirrorless camera and the Sony A99 being a Mid-size SLR camera.

Before going straight to a complete comparison, here is a simple view of how the A7S III scores against the A99 with regard to portability, imaging, features and an overall rating.

Here is a sample of the gallery pics for Sony Alpha A7S III & Sony SLT-A99. The entire galleries are viewable at Sony A7S III Gallery & Sony A99 Gallery.

For anybody who is planning to carry your camera often, you're going to have to consider its weight and dimensions. The Sony A7S III has external 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) and the Sony A99 has dimensions of 147mm x 111mm x 78mm (5.8" x 4.4" x 3.1") with a weight of 812 grams (1.79 lbs).

Look at the Sony A7S III versus Sony A99 in our newest Camera plus Lens Size Comparison Tool.

Keep in mind, the weight of an ILC will vary based on the lens you are using at the time. Here is a front view dimension comparison of the A7S III compared to the A99.

Factoring in size and weight, the portability rating of the A7S III and A99 is 61 and 57 respectively.

Usually, it is very difficult to see the difference in sensor sizing purely by going through specifications. The photograph underneath will provide you a clearer sense of the sensor dimensions in the A7S III and A99.

Plainly, each of these cameras provide the same sensor dimensions but not the same megapixels. You can expect to see the Sony A99 to provide more detail having its extra 12 Megapixels. Greater resolution will allow you to crop images more aggressively. The younger A7S III will have an advantage with regard to sensor innovation.