Left panel: FDS footprint of the area covered by ugri photometry (green solid line), and by only gri (dashed green line). Other sources from catalogs available in the literature are also shown, as labeled. Bright galaxies from the Fornax Cluster Catalog (Ferguson 1989) are subdivided into two categories: likely members brighter than B_T = 17 mag and with 17 ≤ B_T (mag) ≤ 18.5 (filled gray circles and blue triangles, respectively; from Ferguson 1989, Table II). Dwarf galaxies from FDS by Venhola et al. (2018), in the magnitude range 18.5 ≤ m_g (mag) ≤ 21, are indicated with red crosses. The positions of the two brightest galaxies, NGC 1316 and NGC 1399, are also shown with a filled cyan triangle and a magenta square, respectively. Orange filled or empty five-pointed stars mark those stars with m_V ≤ 7/≤9 mag, respectively. Right panel: FDS and FDSex area. Green lines mark the edges of the survey, green bullets show the edges of single pointings; the ID of the field is also indicated.