Canon A3100 IS vs Sigma SD15

Lets look a little more in depth at the Canon A3100 IS versus Sigma SD15, one being a Small Sensor Compact and the other is a Advanced DSLR by brands Canon and Sigma. There is a crucial difference among the resolutions of the A3100 IS (12MP) and SD15 (5MP) and the A3100 IS (1/2.3") and SD15 (APS-C) boast totally different sensor size.

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The A3100 IS was announced within a month of the SD15 which means that they are both of a similar generation. Both cameras feature different body design with the Canon A3100 IS being a Compact camera and the Sigma SD15 being a Mid-size SLR camera.

Before we go right into a full comparison, here is a concise synopsis of how the A3100 IS scores versus the SD15 with regard to portability, imaging, features and an overall rating.

Below is a sample of the gallery pictures for Canon PowerShot A3100 IS and Sigma SD15. The whole galleries are viewable at Canon A3100 IS Gallery and Sigma SD15 Gallery.

When you are going to carry your camera often, you need to factor its weight and volume. The Canon A3100 IS comes with physical measurements of 97mm x 58mm x 28mm (3.8" x 2.3" x 1.1") accompanied by a weight of 165 grams (0.36 lbs) and the Sigma SD15 has sizing of 144mm x 107mm x 81mm (5.7" x 4.2" x 3.2") and a weight of 750 grams (1.65 lbs).

Examine the Canon A3100 IS versus Sigma SD15 in the new Camera with Lens Size Comparison Tool.

Take into consideration, the weight of an Interchangeable Lens Camera will change based on the lens you are working with at the time. Here is a front view over all size comparison of the A3100 IS and the SD15.

Factoring in size and weight, the portability score of the A3100 IS and SD15 is 94 and 59 respectively.

In many cases, it's difficult to visualise the contrast in sensor sizing purely by going through a spec sheet. The visual below will help provide you a far better sense of the sensor sizing in the A3100 IS and SD15.

Clearly, each of the cameras feature different megapixel count and different sensor sizing. The A3100 IS using its smaller sensor will make achieving shallow depth of field more challenging and the Canon A3100 IS will produce more detail with its extra 7MP. Greater resolution will also make it easier to crop pics way more aggressively.