A transmission is provided having an input member, an output member, three planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. The interface of the silicon germanium and the nickel silicon germanium silicide has a lower specific contact resistivity based on a decreased metal-semiconductor work function between the silicon germanium and the silicide and the increased carrier mobility in silicon germanium versus silicon. The variable phase adjuster is configured to provide a phase adjusted signal, a phase of which is shifted with respect to a phase of an output signal of the oscillator, or with respect to a phase of a signal derived from the output signal of the oscillator. Fine focusing is performed by adjusting the focus according to the focus distance already determined for another field of view and by focusing with fine steps.