Sigma SD1 vs Sony A7R III

Its time to look more closely at the Sigma SD1 vs Sony A7R III, former being a Advanced DSLR while the latter is a Pro Mirrorless by manufacturers Sigma and Sony. There exists a substantial gap between the image resolutions of the SD1 (15MP) and A7R III (42MP) and the SD1 (APS-C) and A7R III (Full frame) possess totally different sensor sizes.

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The SD1 was unveiled 8 years earlier than the A7R III and that is quite a big difference as far as technology is concerned. Both the cameras offer different body type with the Sigma SD1 being a Mid-size SLR camera and the Sony A7R III being a SLR-style mirrorless camera.

Before diving through a comprehensive comparison, below is a concise introduction of how the SD1 scores vs the A7R III in terms of portability, imaging, features and an overall rating.

Here is a preview of the gallery photos for Sigma SD1 & Sony Alpha A7R III. The full galleries are viewable at Sigma SD1 Gallery & Sony A7R III Gallery.

For anyone who is going to carry your camera, you will want to think about its weight and dimensions. The Sigma SD1 comes with exterior dimensions of 146mm x 113mm x 80mm (5.7" x 4.4" x 3.1") having a weight of n/a grams (0.00 lbs) while the Sony A7R III has dimensions of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") with a weight of 657 grams (1.45 lbs).

Check the Sigma SD1 vs Sony A7R III in our completely new Camera plus Lens Size Comparison Tool.

Keep in mind, the weight of an ILC will vary depending on the lens you have during that time. Here is the front view overall size comparison of the SD1 compared to the A7R III.

Looking at dimensions and weight, the portability grade of the SD1 and A7R III is 77 and 63 respectively.

Normally, its tough to visualise the contrast between sensor sizing purely by checking technical specs. The graphic below will help give you a clearer sense of the sensor sizes in the SD1 and A7R III.

As you can tell, each of the cameras offer different megapixel count and different sensor sizing. The SD1 with its tinier sensor will make getting bokeh trickier and the Sony A7R III will resolve extra detail having an extra 27 Megapixels. Higher resolution can also let you crop shots a little more aggressively. The older SD1 is going to be disadvantaged with regard to sensor tech.