Mobile phone cameras are about to get a significant performance boost. Sony on Monday introduced a 48-megapixel sensor for cellphone cameras that measures less than one-third of an inch diagonally. The sensor is slated for release in September. To pack that many pixels into such tight quarters, Sony had to shrink their size to 8 microns. Shrinking pixel sizes usually results in performance degradation, not improvement. It usually results in poor light collection and a drop in saturation sensitivity and volume.