We have developed a simple but effective guider for use with the Oxford SWIFT integral field spectrograph on the Palomar 200-inch telescope. The guider uses mainly off-the-shelf components, including commercial amateur astronomy software to interface with the CCD camera, calculate guiding corrections, and send guide commands to the telescope. The only custom piece of software is a driver to provide an interface between the Palomar telescope control system and the industry standard 'ASCOM' system. Using existing commercial software provided a very cheap guider (＜$5000) with minimal (＜15 minutes) commissioning time. The final system provides sub-arcsecond guiding, and could easily be adapted to any other professional telescope.
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