Left: mosaic image of NGC 1851 taken with GeMS/GSAOI with a field of view of 83″ × 83″. The positions of the five sodium LGSs are shown with orange markers and the three NGSs (clockwise from the left, m_R = 13.3, 14.4, 13.7) are indicated by red circles. Right: a zoom-in of the region in the left panel contained within the blue rectangle observed with GSAOI in the K_s band (top) and the same region observed with HST/ACS in the optical by Sarajedini et al. (2007) (bottom). The spatial resolution of Gemini in the NIR and HST in the optical is comparable.