Sigma SD9 vs Sony a1

Let's take a deeper look at the Sigma SD9 versus Sony a1, one being a Advanced DSLR and the other is a Pro Mirrorless by rivals Sigma and Sony. There is a sizeable difference among the image resolutions of the SD9 (3MP) and a1 (50MP) and the SD9 (APS-C) and a1 (Full frame) possess different sensor sizes.

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The SD9 was revealed 19 years earlier than the a1 and that is a fairly large gap as far as camera tech is concerned. The two cameras offer different body type with the Sigma SD9 being a Mid-size SLR camera and the Sony a1 being a SLR-style mirrorless camera.

Before going in to a more detailed comparison, below is a quick summary of how the SD9 matches up against the a1 in regards to portability, imaging, features and an overall rating.

This is a sample of the gallery pictures for Sigma SD9 and Sony Alpha a1. The full galleries are viewable at Sigma SD9 Gallery and Sony a1 Gallery.

For anybody who is looking to carry your camera often, you'll have to factor in its weight and measurements. The Sigma SD9 offers outside measurements of 152mm x 120mm x 79mm (6.0" x 4.7" x 3.1") with a weight of 950 grams (2.09 lbs) whilst the Sony a1 has proportions of 129mm x 97mm x 70mm (5.1" x 3.8" x 2.8") accompanied by a weight of 737 grams (1.62 lbs).

Check the Sigma SD9 versus Sony a1 in the new Camera with Lens Size Comparison Tool.

Do not forget, the weight of an Interchangeable Lens Camera will differ based on the lens you have chosen at that time. Below is the front view scale comparison of the SD9 compared to the a1.

Taking into account size and weight, the portability rating of the SD9 and a1 is 54 and 61 respectively.

Generally, it is very difficult to visualize the gap in sensor sizing just by going through specifications. The visual below should give you a far better sense of the sensor sizing in the SD9 and a1.

To sum up, each of the cameras offer different megapixel count and different sensor sizing. The SD9 having a smaller sensor is going to make shooting shallower DOF tougher and the Sony a1 will provide extra detail because of its extra 47 Megapixels. Greater resolution will also help you crop images a little more aggressively. The older SD9 will be disadvantaged in sensor tech.