Sony A7S III vs Sony A33

Here is a thorough analysis of the Sony A7S III versus Sony A33, one being a Pro Mirrorless and the latter is a Entry-Level DSLR and both of them are sold by Sony. The resolution of the A7S III (12MP) and the A33 (14MP) is pretty well matched but the A7S III (Full frame) and A33 (APS-C) provide totally different sensor size.

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The A7S III was revealed 10 years later than the A33 and that is quite a big gap as far as tech is concerned. Both the cameras feature different body design with the Sony A7S III being a SLR-style mirrorless camera and the Sony A33 being a Compact SLR camera.

Before we go into a detailed comparison, here is a quick overview of how the A7S III scores against the A33 with regards to portability, imaging, features and an overall rating.

Here is a preview of the gallery images for Sony Alpha A7S III and Sony SLT-A33. The full galleries are provided at Sony A7S III Gallery and Sony A33 Gallery.

If you're planning to carry your camera, you'll have to factor its weight and measurements. The Sony A7S III has external measurements of 129mm x 97mm x 81mm (5.1" x 3.8" x 3.2") along with a weight of 699 grams (1.54 lbs) whilst the Sony A33 has proportions of 124mm x 92mm x 85mm (4.9" x 3.6" x 3.3") accompanied by a weight of 500 grams (1.10 lbs).

Examine the Sony A7S III versus Sony A33 in the new Camera and Lens Size Comparison Tool.

Take into account, the weight of an Interchangeable Lens Camera will vary dependant on the lens you are employing at that time. Underneath is a front view scale comparison of the A7S III vs the A33.

Taking into account size and weight, the portability rating of the A7S III and A33 is 61 and 67 respectively.

Usually, it is very tough to visualise the contrast between sensor sizing just by checking technical specs. The graphic here will help give you a much better sense of the sensor sizing in the A7S III and A33.

As you have seen, the 2 cameras feature different resolutions and different sensor sizing. The A7S III with its bigger sensor will make achieving shallower depth of field easier and the Sony A33 will give you greater detail because of its extra 2MP. Higher resolution will also help you crop shots way more aggressively. The more recent A7S III is going to have an advantage with regard to sensor technology.