Lensing survey of a sample of X-ray luminous galaxy clusters

We present a lensing survey consisting of the 22 most X-ray luminous galaxy clusters selected from the ROSAT Bright Survey. All clusters are located in the medium redshift regime (0.1 ⩽ z ⩽ 0.52) and hence the probability for finding strongly lensed objects of background sources (gravitational arcs) is very high. In these conference proceedings we present several lensing features in three clusters of this survey.