Request InfoPrior Scientific Inc.The NIKRFK focus drive with an integral electronic clutch is now available from Prior Scientific Inc. Designed for the Nikon Ti, 80i and FN1 microscopes, the focus drive offers resolution and repeatability under software control. The electronic clutch can be disengaged with the push of a button to offer users smooth operation when using the microscope’s manual focus knob. An optional focus encoder kit provides accuracy with a 50-nm-resolution probe style encoder. The kit includes a controller, a focus drive mechanism, cables and a power supply. 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