  We present the first three galaxy clusters of a larger sample of the most
X-ray luminous galaxy clusters selected from the ROSAT Bright Survey. This
project, which is a systematic search for strong lensing, aims at arc
statistics, mass determinations and studies of distant lensed galaxies.
  The three galaxy clusters presented here have been observed with the Wide
Field Imager at the ESO2.2m in the R- and V-band. The images show lensing
features like distinct distorted galaxies and arcs. Mass distributions of the
lensing galaxy clusters and photometric properties of some arc candidates are
presented. In addition we report the discovery of three giant arcs.
