Sigma SD15 vs Sony A55

Here is a complete comparison of the Sigma SD15 and Sony A55, former being a Advanced DSLR while the other is a Entry-Level DSLR by competitors Sigma and Sony. There is a sizable difference between the resolutions of the SD15 (5MP) and A55 (16MP) but both cameras offer the same sensor sizes (APS-C).

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The SD15 was launched 6 months before the A55 so they are both of a similar age. Both the cameras have different body design with the Sigma SD15 being a Mid-size SLR camera and the Sony A55 being a Compact SLR camera.

Before delving right into a full comparison, here is a simple summation of how the SD15 matches up versus the A55 for portability, imaging, features and an overall rating.

Here is a sample of the gallery pictures for Sigma SD15 & Sony SLT-A55. The complete galleries are viewable at Sigma SD15 Gallery & Sony A55 Gallery.

For anyone who is intending to carry your camera frequently, you will need to consider its weight and volume. The Sigma SD15 comes with outside measurements of 144mm x 107mm x 81mm (5.7" x 4.2" x 3.2") with a weight of 750 grams (1.65 lbs) whilst the Sony A55 has sizing of 124mm x 92mm x 85mm (4.9" x 3.6" x 3.3") having a weight of 500 grams (1.10 lbs).

Take a look at the Sigma SD15 and Sony A55 in our brand new Camera & Lens Size Comparison Tool.

Keep in mind, the weight of an ILC will change based on the lens you have chosen at that moment. Underneath is a front view dimensions comparison of the SD15 versus the A55.

Considering size and weight, the portability score of the SD15 and A55 is 59 and 67 respectively.

In many cases, it is tough to picture the contrast between sensor sizing merely by reading through technical specs. The photograph below will give you a more clear sense of the sensor measurements in the SD15 and A55.

As you can tell, both of these cameras provide the same sensor dimensions but different MP. You can anticipate the Sony A55 to give you greater detail utilizing its extra 11MP. Greater resolution will let you crop images more aggressively.