Fujifilm X20 vs X10 Image comparsion, according to fujifilm the new X20 have no Low-Pass Filter (as Nikon D800), the new sensor inside X20, the 2/3-inch X-Trans CMOS II sensor inherits the same architecture and features of the high performance sensor found in the acclaimed X-Pro1 flagship model. Adoption of BSI (backside illumination) technology enables the successful incorporation of phase detection pixels into the array without affecting sensitivity performance- the key to X20’s high-speed AF.
Take a look at major difference
FYI, the D800 does have a low-pass filter, only the D800E doesn’t. 😉 (and this example is simulated)
Thanks, corrected the Typo.