Sigma SD1 vs Sony A99

Following is a detailed assessment of the Sigma SD1 and Sony A99, both Advanced DSLR cameras by rivals Sigma and Sony. There exists a big gap among the image resolutions of the SD1 (15MP) and A99 (24MP) and the SD1 (APS-C) and A99 (Full frame) feature different sensor size.

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The SD1 was announced 3 years before the A99 which is a fairly big gap as far as camera technology is concerned. Both of these cameras offer the identical body type (Mid-size SLR).

Before going through a comprehensive comparison, below is a concise overview of how the SD1 matches up against the A99 with respect to portability, imaging, features and an overall score.

Here is a sample of the gallery pictures for Sigma SD1 and Sony SLT-A99. The whole galleries are available at Sigma SD1 Gallery and Sony A99 Gallery.

When you are planning to carry around your camera frequently, you have to factor its weight and proportions. The Sigma SD1 has got external dimensions of 146mm x 113mm x 80mm (5.7" x 4.4" x 3.1") having a weight of n/a grams (0.00 lbs) while the Sony A99 has measurements of 147mm x 111mm x 78mm (5.8" x 4.4" x 3.1") having a weight of 812 grams (1.79 lbs).

Contrast the Sigma SD1 and Sony A99 in the latest Camera with Lens Size Comparison Tool.

Do not forget, the weight of an Interchangeable Lens Camera will vary depending on the lens you use at that time. Here is the front view proportions comparison of the SD1 compared to the A99.

Taking into consideration dimensions and weight, the portability grade of the SD1 and A99 is 77 and 57 respectively.

More often than not, its difficult to picture the gap in sensor sizes just by checking out a spec sheet. The picture here will give you a clearer sense of the sensor sizes in the SD1 and A99.

As you can see, both of those cameras offer different resolutions and different sensor sizes. The SD1 with its smaller sensor is going to make shooting shallower DOF trickier and the Sony A99 will provide more detail with its extra 9 Megapixels. Greater resolution can also help you crop photos a little more aggressively. The more aged SD1 will be behind with regard to sensor innovation.