A 10MP CMOS/CCD camera has 5 million sensor sites that captures ONLY green light, 2.5 million that capture ONLY red and 2.5 million that capture ONLY blue.
Following this logic that everyone seems to accept, what other choice does Sigma have?
They have 15 million sensor sites capturing ONLY green light
They have 15 million sensor sites capturing ONLY red light
They have 15 million sensor sites capturing ONLY blue light
Using the EXACT same method as everyone else, SIGMA SD1 is EXACTLY a 45 MP camera.
Just like with CCD and CMOS cameras, you can use a SETTING on the camera where the OUTPUT (I.e. image file) is X number of mega-pixels..say 12, 8 and 4.
When my Nikon D300 outputs 4MP, does it become a 4MP Camera? No, of course not. Everyone would say that it's silly to say so.
When the SD1 outputs an image-file that is 15 MP, does that make it a 15MP Camera?
I am personally at a complete loss at trying to understand why this has caused so much controversy...lol. Sigma is doing EXACTLY the same thing as everyone else...!