Sigma SD1 vs Sony A100

Here, we are analyzing the Sigma SD1 and Sony A100, former is a Advanced DSLR while the other is a Entry-Level DSLR by brands Sigma and Sony. There is a noticeable difference between the image resolutions of the SD1 (15MP) and A100 (10MP) but both cameras have the identical sensor sizes (APS-C).

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The SD1 was announced 4 years after the A100 which is quite a sizable difference as far as tech is concerned. Both of these cameras feature different body design with the Sigma SD1 being a Mid-size SLR camera and the Sony A100 being a Compact SLR camera.

Before delving right into a step-by-step comparison, here is a brief summation of how the SD1 grades vs the A100 with respect to portability, imaging, features and an overall score.

Following is a sample of the gallery pics for Sigma SD1 & Sony Alpha DSLR-A100. The whole galleries are available at Sigma SD1 Gallery & Sony A100 Gallery.

For anybody who is aiming to carry around your camera often, you will have to factor its weight and dimensions. The Sigma SD1 offers outer dimensions of 146mm x 113mm x 80mm (5.7" x 4.4" x 3.1") accompanied by a weight of n/a grams (0.00 lbs) and the Sony A100 has dimensions of 133mm x 95mm x 71mm (5.2" x 3.7" x 2.8") accompanied by a weight of 638 grams (1.41 lbs).

See the Sigma SD1 and Sony A100 in our completely new Camera & Lens Size Comparison Tool.

Bear in mind, the weight of an ILC will differ based on the lens you select at that time. Here is a front view physical size comparison of the SD1 vs the A100.

Looking at size and weight, the portability score of the SD1 and A100 is 77 and 64 respectively.

Often, it is very hard to imagine the gap between sensor sizes simply by going over specs. The pic below may give you a more clear sense of the sensor sizes in the SD1 and A100.

As you can plainly see, the two cameras feature the identical sensor size but different MP. You can expect to see the Sigma SD1 to deliver extra detail with its extra 5 Megapixels. Greater resolution will also allow you to crop photos way more aggressively. The newer SD1 provides a benefit with regard to sensor technology.