Sigma Quattro vs Sony A900

Lets look closer at the Sigma Quattro versus Sony A900, former being a Advanced Mirrorless while the other is a Advanced DSLR by companies Sigma and Sony. The sensor resolution of the Quattro (29MP) and the A900 (25MP) is fairly comparable but the Quattro (APS-C) and A900 (Full frame) offer different sensor dimensions.

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The Quattro was revealed 7 years later than the A900 and that is a fairly large difference as far as camera tech is concerned. Both of the cameras have different body design with the Sigma Quattro being a Rangefinder-style mirrorless camera and the Sony A900 being a Mid-size SLR camera.

Before delving straight to a complete comparison, here is a concise summation of how the Quattro scores against the A900 in terms of portability, imaging, features and an overall grade.

Below is a sample of the gallery pictures for Sigma sd Quattro & Sony Alpha DSLR-A900. The full galleries are available at Sigma Quattro Gallery & Sony A900 Gallery.

In case you're going to lug around your camera frequently, you'll need to consider its weight and proportions. The Sigma Quattro has exterior dimensions of 147mm x 95mm x 91mm (5.8" x 3.7" x 3.6") having a weight of 625 grams (1.38 lbs) while the Sony A900 has measurements of 156mm x 117mm x 82mm (6.1" x 4.6" x 3.2") having a weight of 895 grams (1.97 lbs).

Contrast the Sigma Quattro versus Sony A900 in our brand new Camera & Lens Size Comparison Tool.

Take into account, the weight of an ILC will change depending on the lens you select during that time. Here is a front view measurement comparison of the Quattro vs the A900.

Considering size and weight, the portability score of the Quattro and A900 is 63 and 54 respectively.

Often, its difficult to visualize the contrast in sensor measurements merely by going through specs. The visual below will give you a much better sense of the sensor sizes in the Quattro and A900.

All in all, both the cameras provide different megapixels and different sensor measurements. The Quattro using its smaller sensor is going to make getting shallow DOF more difficult and the Sigma Quattro will provide more detail because of its extra 4MP. Greater resolution will also make it easier to crop pics more aggressively. The more modern Quattro should have a benefit with regard to sensor innovation.