Herschel/SPIRE image of 350 µm dust continuum emission toward the central part of the Chamaeleon I cloud. The dotted contour outlines the extent of the dust emission at 50% of the peak. Black circles mark the Cha-MMS1 and Cha-C2 pointings, and the white circle indicates the reference position used for the DSN observations. The size of the two circles corresponds to the FWHM beam size of the Canberra telescope (45″ ). The black circle in the lower-left corner shows the FWHM size of the SPIRE beam (25.2″). White stars mark locations of NIR38 and J110621228, the two background stars with ice spectra studied by McClure et al. (2023), and the cyan triangle marks the location of the binary protostar Ced 110 IRS4 (Rocha et al. 2025). The lower panels show the dust continuum SED in the Canberra beam, based on PACS and SPIRE observations. The black curves are modified blackbody fits to the SPIRE and PACS 160 µm surface brightness, as described in the text. Typical flux calibration uncertainties are 5%.