The University of Wisconsin - Madison's Department of Astronomy, together with Rutgers University and the South African Astronomical Observatory, is building a Prime Focus Imaging Spectrograph (PFIS) for the SALT telescope. The PFIS will specialize in very high throughput low- and medium-resolution (R = 500-10000) spectroscopy, high time resolution spectroscopy, and spectropolarimetry from 3200 to 9000 Angstroms, using an articulated camera and Volume Phase Holographic gratings and a double etalon Fabry-Perot system. With a peak efficiency near 60% and a 3200 Angstrom efficiency above 25%, it will be unique among or superior to existing 8-10m telescopes in the UV, in medium resolution spectroscopy, in Fabry- Perot spectroscopy, and in spectropolarimetry.
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