Sigma SD15 vs Sony A7

Here is a in-depth overview of the Sigma SD15 and Sony A7, one being a Advanced DSLR and the latter is a Pro Mirrorless by manufacturers Sigma and Sony. There exists a significant gap among the sensor resolutions of the SD15 (5MP) and A7 (24MP) and the SD15 (APS-C) and A7 (Full frame) enjoy totally different sensor size.

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The SD15 was unveiled 4 years before the A7 and that is a fairly sizable gap as far as camera technology is concerned. Both of these cameras offer different body type with the Sigma SD15 being a Mid-size SLR camera and the Sony A7 being a SLR-style mirrorless camera.

Before delving straight into a complete comparison, below is a simple highlight of how the SD15 grades vs the A7 in regards to portability, imaging, features and an overall rating.

The following is a preview of the gallery images for Sigma SD15 and Sony Alpha A7. The full galleries are available at Sigma SD15 Gallery and Sony A7 Gallery.

For those who are planning to carry your camera frequently, you'll need to factor in its weight and size. The Sigma SD15 has external dimensions of 144mm x 107mm x 81mm (5.7" x 4.2" x 3.2") with a weight of 750 grams (1.65 lbs) while the Sony A7 has specifications of 127mm x 94mm x 48mm (5.0" x 3.7" x 1.9") accompanied by a weight of 474 grams (1.04 lbs).

Compare the Sigma SD15 and Sony A7 in the all new Camera with Lens Size Comparison Tool.

Remember that, the weight of an Interchangeable Lens Camera will differ depending on the lens you are utilising at that time. Underneath is the front view physical size comparison of the SD15 versus the A7.

Factoring in dimensions and weight, the portability rating of the SD15 and A7 is 59 and 78 respectively.

More often than not, it is very difficult to see the contrast in sensor sizing only by researching technical specs. The photograph underneath might offer you a stronger sense of the sensor sizes in the SD15 and A7.

As you have seen, each of these cameras enjoy different megapixel count and different sensor sizing. The SD15 having a smaller sensor will make getting shallow depth of field more challenging and the Sony A7 will result in greater detail having an extra 19 Megapixels. Higher resolution will let you crop photographs far more aggressively. The older SD15 will be behind when it comes to sensor tech.