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AstraLux is a Lucky Imaging camera for the Calar Alto 2.2-m telescope, basedon an electron-multiplying high speed CCD. By selecting only the best 1-10% ofseveral thousand short exposure frames, AstraLux provides nearly diffractionlimited imaging capabilities in the SDSS i' and z' filters over a field of viewof 24x24 arcseconds. By choosing commercially available components whereverpossible, the instrument could be built in short time and at comparably lowcost. We briefly present the instrument design, the data reduction pipeline,and summarise the performance and characteristics

AstraLux - the Calar Alto 2.2-m telescope Lucky Imaging camera