This experiment has been performed as part of the advanced lab course for physics students (FP) at Heidelberg University.  

The  theoretical and experimental basics needed for the understanding of the conducted measurements is introduced and important concepts of CCD are presented and discussed. 

The characteristics of CCD used in KING telescope on Königstuhl, Heidleberg are analysed using data we recorded with the computer program ...

Furthermore we used archival images from the Hubble Space Telescope (HST) to produce a color magnitude diagram (CMD)  to estimate the distance, age, and metallicity of the cluster.

Lastly we present and discuss ...