You can use MF lenses on modern DSLR's that have Phase Detection. There are adapters with electronic connections between the MF lens and the DSLR that allow the PDAF system to detect correct focus on any of their focal points. It is not a special feature. It is the nature of electronic Phase Detection Autofocus to be able to determine correct focus whether the lens has autofocus or if you turn the barrel of a manual focus lens. It is the same thing. When the phase changes and focus occurs, you get a beep and the focus box lights up. In the Four Thirds world, there are special adapters with electronic connections that allow PD Focus Detection with MF lenses. I bought one on eBay for $20, for Pentax K lenses, and I bought a Fotasy MFT to FT adapter. I fully expect PD "Focus Peaking" to work brilliantly on any focal point I choose in the Olympus OM-D E-M1 and I suspect this method of Focus Peaking will be more flexible and effective than the Contrast Detection method offered in firmware.