The E-709 compact digital piezo servo controller / amplifier and driver was designed providing 20kHz sampling rate, twice the power of its predecessor along with multiple times is positioning resolution. When used in image processing, scanning and microscopy applications, its advanced features such as high-performance linearization, high speed tracking, and PI's unique F3 capability (Fast Focus & Freeze) come in handy. When used with a fast objective focusing motor such as the P-725, the autofocus drive can be bumplessly switched from an external (focus) sensor to the integrated position sensor inside the focusing stage. This feature allows for calibrated, precise, and highly stable motions on a nanometer scale, with respect to the focal plane.