Myślę że ten gość wie co mówi.Westfall said one of the keys about the 50D is its enhanced noise reduction which is "a stop to a stop and half better than the 40D."
"Despite the fact that the pixels are smaller and one camera has a 10.1MP sensor and the other has a 15.1MP sensor, you'd think you'd have more noise but you have less," he said. "The end result is better image quality all around which allows us to extend the ISO range to 12800.
The 50D is able to achieve this because of new "gapless microlenses" on the image sensor which capture more light and generate less noise.
"It's the further evolution of a concept we've already explored. It's gotten to the point where the microlenses are totally gapless and larger which produces the best efficency on a per pixel basis. Consequently the light senstiviy portion of the pixel has increased while the non-light sensitive protion of the pixel has been shrunk down," he said. "Another part of the reason you have a cleaner signal coming out is DIGIC 4 is considerable more powerful than the DIGIC 3 and offers better noise reduction."