Sigma SD15 vs Sony A7R

Here, we are looking at the Sigma SD15 and Sony A7R, one is a Advanced DSLR and the other is a Pro Mirrorless by manufacturers Sigma and Sony. There is a big difference among the resolutions of the SD15 (5MP) and A7R (36MP) and the SD15 (APS-C) and A7R (Full frame) posses totally different sensor sizing.

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The SD15 was introduced 5 years prior to the A7R which is a fairly big gap as far as camera tech is concerned. Each of these cameras feature different body design with the Sigma SD15 being a Mid-size SLR camera and the Sony A7R being a SLR-style mirrorless camera.

Before diving right into a step-by-step comparison, here is a simple view of how the SD15 scores vs the A7R in terms of portability, imaging, features and an overall mark.

The following is a sample of the gallery pics for Sigma SD15 and Sony Alpha A7R. The whole galleries are viewable at Sigma SD15 Gallery and Sony A7R Gallery.

When you are aiming to travel with your camera regularly, you're going to have to factor in its weight and measurements. The Sigma SD15 has got outer measurements of 144mm x 107mm x 81mm (5.7" x 4.2" x 3.2") along with a weight of 750 grams (1.65 lbs) while the Sony A7R has proportions of 127mm x 94mm x 48mm (5.0" x 3.7" x 1.9") along with a weight of 465 grams (1.03 lbs).

Contrast the Sigma SD15 and Sony A7R in the latest Camera and Lens Size Comparison Tool.

Do not forget, the weight of an Interchangeable Lens Camera will change based on the lens you have chosen during that time. The following is a front view over all size comparison of the SD15 vs the A7R.

Looking at size and weight, the portability rating of the SD15 and A7R is 59 and 78 respectively.

Oftentimes, it can be tough to visualise the difference in sensor dimensions simply by checking out a spec sheet. The image underneath might offer you a more clear sense of the sensor sizing in the SD15 and A7R.

As you can see, each of these cameras feature different megapixels and different sensor dimensions. The SD15 using its smaller sensor will make achieving shallow DOF trickier and the Sony A7R will show greater detail using its extra 31MP. Greater resolution will also enable you to crop pics way more aggressively. The more aged SD15 will be disadvantaged in sensor technology.