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Three acquisition and guider units are available, one dedicated to the Wide Field Photographic Camera (WFC) at the f/8.06 focus, one dedicated to CCD imaging at the f/15 Cassegrain focus, and one for use with other instruments at the f/15 focus. In fact, only the first two incorporate an autoguider. Guide stars can normally be found using the Guide Star System, described in section gif.

Tue Aug 15 16:42:46 BST 1995