Sigma SD15 vs Sony A580

Here is a complete review of the Sigma SD15 versus Sony A580, one being a Advanced DSLR and the other is a Entry-Level DSLR by brands Sigma and Sony. There exists a big gap among the resolutions of the SD15 (5MP) and A580 (16MP) but both cameras posses the same sensor sizing (APS-C).

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The SD15 was launched 15 months earlier than the A580 making them a generation apart from one another. Both of the cameras have different body design with the Sigma SD15 being a Mid-size SLR camera and the Sony A580 being a Compact SLR camera.

Before diving right into a comprehensive comparison, here is a short highlight of how the SD15 matches up against the A580 with regard to portability, imaging, features and an overall rating.

Following is a sample of the gallery pics for Sigma SD15 and Sony Alpha DSLR-A580. The complete galleries are available at Sigma SD15 Gallery and Sony A580 Gallery.

In case you're intending to carry your camera often, you'll have to factor in its weight and dimensions. The Sigma SD15 features physical measurements of 144mm x 107mm x 81mm (5.7" x 4.2" x 3.2") with a weight of 750 grams (1.65 lbs) and the Sony A580 has dimensions of 137mm x 104mm x 84mm (5.4" x 4.1" x 3.3") accompanied by a weight of 599 grams (1.32 lbs).

Compare the Sigma SD15 versus Sony A580 in the all new Camera with Lens Size Comparison Tool.

Remember that, the weight of an Interchangeable Lens Camera will vary based on the lens you select at that moment. Underneath is a front view proportions comparison of the SD15 compared to the A580.

Taking into account dimensions and weight, the portability grade of the SD15 and A580 is 59 and 64 respectively.

Typically, it is tough to visualize the gap in sensor sizing merely by viewing technical specs. The visual below should provide you a far better sense of the sensor sizing in the SD15 and A580.

As you have seen, both the cameras provide the same sensor dimensions but different megapixels. You should expect to see the Sony A580 to provide you with more detail utilizing its extra 11 Megapixels. Greater resolution will also enable you to crop images more aggressively. The older SD15 will be disadvantaged in sensor innovation.