Weigelt blobs B and D: taken from an HST/ACS F550M image recorded in 2002, the 2″  ×  2″ field of view reveals the complex ejecta surrounding η Car (white core). Three dots define the positions of Weigelt blobs B, C and D. Superimposed (white lines) is the position of the HST/STIS 52″  ×  01 aperture when centered on η Car. The two black lines denote the boundary of the extracted spectra discussed in this paper. Weigelt blobs B and D are centered within the aperture, with B closest to the stars. Weigelt C is to the west (right). Note that slit position angle is 332°.