Gemini Observatory, 670 N. A'Ohoku Place, University Park, Hilo, Hawaii 86720, USA
Ground-conjugate wide field AO is presented and preliminary performance results are given, which show that significant seeing improvement can be achieved over 10-20 arcmin field of view. A proposal for an ELT AO system is sketched.
To appear in the proceedings of Venice 2001 Beyond Conventional Adaptive Optics.
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