ISO Mid-Infrared Observations of Abell 370

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.