Sigma SD1 Merrill vs Sony A7R III

In this article, we are looking at the Sigma SD1 Merrill vs Sony A7R III, former is a Advanced DSLR while the other is a Pro Mirrorless by manufacturers Sigma and Sony. There is a substantial difference among the sensor resolutions of the SD1 Merrill (15MP) and A7R III (42MP) and the SD1 Merrill (APS-C) and A7R III (Full frame) possess different sensor sizing.

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The SD1 Merrill was announced 6 years prior to the A7R III which is a fairly big difference as far as camera tech is concerned. Both of these cameras offer different body type with the Sigma SD1 Merrill being a Mid-size SLR camera and the Sony A7R III being a SLR-style mirrorless camera.

Before diving through a in depth comparison, below is a quick synopsis of how the SD1 Merrill grades versus the A7R III for portability, imaging, features and an overall score.

Below is a sample of the gallery pics for Sigma SD1 Merrill & Sony Alpha A7R III. The whole galleries are provided at Sigma SD1 Merrill Gallery & Sony A7R III Gallery.

If you are planning to carry around your camera, you'll need to consider its weight and size. The Sigma SD1 Merrill features external measurements of 146mm x 113mm x 80mm (5.7" x 4.4" x 3.1") along with a weight of 790 grams (1.74 lbs) and the Sony A7R III has specifications of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") with a weight of 657 grams (1.45 lbs).

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

Do not forget, the weight of an ILC will differ based on the lens you are utilising at that moment. Here is the front view over all size comparison of the SD1 Merrill against the A7R III.

Looking at size and weight, the portability grade of the SD1 Merrill and A7R III is 57 and 63 respectively.

Usually, its difficult to picture the difference in sensor sizes purely by going through a spec sheet. The picture below will help give you a greater sense of the sensor sizing in the SD1 Merrill and A7R III.

Clearly, both of those cameras offer different resolutions and different sensor sizes. The SD1 Merrill with its smaller sensor is going to make getting bokeh trickier and the Sony A7R III will provide more detail with its extra 27MP. Greater resolution will enable you to crop photos a little more aggressively. The more aged SD1 Merrill will be disadvantaged in sensor innovation.