Sigma SD15 vs Sony A99

Lets examine more in depth at the Sigma SD15 and Sony A99, both Advanced DSLR cameras by companies Sigma and Sony. There is a big difference among the resolutions of the SD15 (5MP) and A99 (24MP) and the SD15 (APS-C) and A99 (Full frame) feature totally different sensor sizes.

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The SD15 was brought out 3 years prior to the A99 which is a fairly big gap as far as camera tech is concerned. The two cameras offer the identical body type (Mid-size SLR).

Before getting straight into a more detailed comparison, below is a simple summary of how the SD15 grades against the A99 when considering portability, imaging, features and an overall mark.

Below is a sample of the gallery pics for Sigma SD15 and Sony SLT-A99. The entire galleries are available at Sigma SD15 Gallery and Sony A99 Gallery.

For anybody who is going to travel with your camera frequently, you're going to have to consider its weight and size. The Sigma SD15 offers outside measurements of 144mm x 107mm x 81mm (5.7" x 4.2" x 3.2") accompanied by a weight of 750 grams (1.65 lbs) whilst the Sony A99 has specifications of 147mm x 111mm x 78mm (5.8" x 4.4" x 3.1") along with a weight of 812 grams (1.79 lbs).

Take a look at the Sigma SD15 and Sony A99 in the new Camera and Lens Size Comparison Tool.

Remember, the weight of an Interchangeable Lens Camera will differ depending on the lens you have at the time. Here is the front view proportions comparison of the SD15 against the A99.

Considering size and weight, the portability score of the SD15 and A99 is 59 and 57 respectively.

Usually, it can be difficult to visualise the contrast in sensor dimensions purely by researching technical specs. The image below may provide you a clearer sense of the sensor sizing in the SD15 and A99.

As you have seen, both of the cameras offer different resolutions and different sensor dimensions. The SD15 featuring a smaller sensor will make achieving bokeh more difficult and the Sony A99 will provide you with greater detail having its extra 19MP. Greater resolution will allow you to crop photos a little more aggressively. The more aged SD15 will be disadvantaged when it comes to sensor technology.