A zoom lens includes, in order from an object side to an image side, first to third lens units having negative, positive, and negative refractive power, respectively, and a rear lens group including a plurality of lens units and having overall positive refractive power, a distance between every adjacent lens unit included in the zoom lens is variable during zooming. The ASAFF captures input data at a clock transition by setting values of a first node and a second node in a manner that is input data value dependent. The channel may include a semiconductive upward extension of the combined first electrode and first sourcedrain. To do so, the power management system dynamically determines the availability of certain power sources and selects a preferred power source based on availability and a defined order of power source preference. Further, the data acquisition system can interface to an engine control module or other controller to allow specific control action or diagnosticsfault reporting. Assuming that the current time is denoted by t0 and T denotes a predetermined value, the yaw rotation of the nacelle is stopped if an average of the wind direction between time t0\u2212T and time t0 corresponds to the direction of the wind turbine rotor.