Sony has figured out how to properly[nb]IMHO[/nb] use a pellicle mirror in the digital age. Here's a sample (assuming this is real and not a PS): [attachimg=1] Source: ; TheHDBLOG, Sonyalpharumors Yes, that is the sensor you see behind the mirror. ; And yes, that means that the AF module is getting phase-detect light at the same time light is hitting the sensor. ; Which means phase-detect during video, or...in this case....10 fps with phase detect and NO MIRROR motion....no viewfinder blackout. Their patent allows for the mirror to flip up if necessary to take still images, but I'm guessing that will be in single shot mode only, or that the max FPS will be limited when you allow for the mirror to flip up to gain the extra 1/3 stop.