Sigma and Foveon sensor
The Sigma is best known here in Brazil for their lenses for Nikon and Canon DSLR but overseas she is known for manufacturing a CMOS sensor that is unlike anything you see out there is the Foveon X3 sensor and this is used only in compacts with 28 and 41mm lenses and the Sigma DSLR's own.
The operation of this sensor system is totally different from others we see around roughly as if he is a different layer for each color RGB (red, green and blue) and then to form the image with more contrast, much more clarity and an unmatched color fidelity. It's probably the best image sensor in the world.
Then comes the question that remains: If this is the best sensor in the world, because other companies do not do the same? Because due to this different system, the resolution will be low and we always use the example of the Sigma SD15 , the latest model launched by Sigma DSLR. Its sensor is 20.7 x 13.8 mm (2.85cm ²), similar to an APS-C DSLR we see the most popular input, captures 14.1 megapixels but it uses 1 / 3 of capacity for each color, then joins them together to form a maximum resolution of 4.7 megapixels.
This goes against the megapixel war promoted by the giants of photography (in the case of compact) because imgine offer a camera today from a 4.7MP costing even the 14MP? The general public, which will be more interesting? Nobody would buy a lower resolution but not only that, those who use DSLR and understand more about it, the lower resolution would entail another problem: The prints of the photos. 4.7MP is not a resolution that allows for large prints and would hurt many professionals are making their use impractical.
But ... for people like me who has more photography as a hobby than as work and praises the quality of image, there is a more tempting option? And for you, what do you think? Let's discuss this. And just for the record, the SD15 in the U.S. runs about 1000 bucks just the body ...
