Editing Foveon X3 sensor (section)

===Light gathering and low-light performance===
Theoretically, the Foveon X3 photosensor can detect more photons entering the camera lens than a mosaic sensor, because each of the color filters overlaying each photosite of a mosaic sensor passes only one of the primary colors and absorbs the other two. However, the individual layers in a Foveon sensor do not respond as sharply to the respective colors; thus color-indicating information in the sensor's raw data requires an "aggressive" matrix (i.e., the removal of common-mode signals) to produce color data in a standard [[color space]], which can increase color noise in low-light situations.<ref>{{cite web|url=http://www.auspiciousdragon.net/photowords/?p=880|title=Know raw? Part 2|date=2007-07-05|work=Photostream on auspiciousdragon.net|url-status=unfit|archive-url=https://web.archive.org/web/20070928113408/http://www.auspiciousdragon.net/photowords/?p=880|archive-date=2007-09-28}}</ref>