The rangefinder on my XA once failed altogether (secondary image did not move) on a long trip to Asia. Since I was shooting mostly scenics with 400 ISO film I did OK by using the distance scale on the lens and smaller f-stops. When I returned and took the camera to a technician for repair (those were the days) he told me a part had broken and that the rangefinder mechanism on the XA was quite delicate. Since then I've guarded the camera against bumps and have had no trouble.