Sigma SD9 vs Sony a5100

In this article, we are comparing the Sigma SD9 vs Sony a5100, former is a Advanced DSLR while the other is a Entry-Level Mirrorless by companies Sigma and Sony. There is a considerable difference among the resolutions of the SD9 (3MP) and a5100 (24MP) but they feature the same exact sensor dimensions (APS-C).

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The SD9 was launched 12 years prior to the a5100 which is a fairly large difference as far as camera tech is concerned. Both the cameras offer different body type with the Sigma SD9 being a Mid-size SLR camera and the Sony a5100 being a Rangefinder-style mirrorless camera.

Before getting through a more detailed comparison, below is a concise summary of how the SD9 scores versus the a5100 in regards to portability, imaging, features and an overall score.

Following is a sample of the gallery pics for Sigma SD9 & Sony Alpha a5100. The complete galleries are available at Sigma SD9 Gallery & Sony a5100 Gallery.

For those who are planning to carry around your camera often, you will need to take into account its weight and dimensions. The Sigma SD9 has got outside measurements of 152mm x 120mm x 79mm (6.0" x 4.7" x 3.1") having a weight of 950 grams (2.09 lbs) and the Sony a5100 has dimensions of 110mm x 63mm x 36mm (4.3" x 2.5" x 1.4") with a weight of 283 grams (0.62 lbs).

Check out the Sigma SD9 vs Sony a5100 in our brand new Camera & Lens Size Comparison Tool.

Remember that, the weight of an ILC will change based on the lens you use during that time. Here is the front view size comparison of the SD9 vs the a5100.

Considering size and weight, the portability rating of the SD9 and a5100 is 54 and 89 respectively.

Generally, it is very difficult to see the difference in sensor sizes purely by looking through specifications. The pic below may give you a far better sense of the sensor sizing in the SD9 and a5100.

Plainly, the two cameras offer the same exact sensor sizing but not the same megapixels. You can expect to see the Sony a5100 to render extra detail utilizing its extra 21MP. Greater resolution can also help you crop photos a little more aggressively. The more aged SD9 will be disadvantaged when it comes to sensor technology.