  We report on the mid-IR imaging at 7 and 10 microns of the galaxy cluster
Abell 370, obtained with the ISOCAM instrument onboard ESA's Infrared Space
Observatory (ISO), as part of an ongoing program to image gravitational arcs
and arclets in distant clusters.
  We have recorded initial detections of the A0 giant arc in both bandpasses,
the two central dominant galaxies at 7 microns, and several other cluster
members and field galaxies.
  These preliminary results are indicative of the potential output of our
program when more extensive observational data become available.
