Photographs of the added or modified hardware for the implementation of GRAVITY Wide. Panel a: newly added periscopes merge the A and B beams of the respective four UT or ATs. Due to space constraints they were mounted hanging down from two motorized bridge structures. Panel b: to compensate for the differential optical path length between the A and B-beams, we now use the differential delay lines formerly belonging to PRIMA. Panel c: these DDLs, however, needed to be modified to relay the pupil to the appropriate location for GRAVITY. The PRIMA DDLs consist of a three mirror cat’s eye with five optical reflections. We replaced the tertiary mirrors to adjust the pupil relay. Our beam path design allowed us to choose identical radii of curvature for all tertiary mirrors.