Photograph of the STIX flight model taken from the Sun-facing side. The black box in the back is the Detector Electronics Module (DEM), which holds 32 CdTe detectors. In front of the DEM, the two grid support frames are seen, each holding 32 tungsten grids. A lens is mounted in the centre of the front grid as part of the STIX aspect system, which is used for absolute placement of the STIX hard X-ray images. The yellow rectangles are protective covers over the finest grids.