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We present new photometric V-, R- and I-band data for the rich galaxy clusterAC 118 at z=0.31. The new photometry covers an area of 8.6x8.6 arcmin$^2$,corresponding to 2.9$\times$2.9 Mpc$^2$ (H$_0=50$ km s$^{-1}$ Mpc$^{-1}$,q$_0=0.5$ and $\Lambda = 0$). The data have been collected for a project aimedat studying galaxy evolution through the color-magnitude relation and thefundamental plane. We provide a catalogue including all the sources (N = 1206)detected in the cluster field. The galaxy sample is complete to V=22.8 mag(N_gal=574), R=22.3 mag (N_gal=649) and I=20.8 mag (N_gal=419). We giveaperture magnitudes within a fixed aperture of 4.4 arcsec and Kron magnitudes.We also give photometric redshifts for 459 sources for which additional U- andK-band photometry is available. We derive and discuss the V- and R-bandluminosity functions. The catalogue, which is distributed in electronic form,is intended as a tool for studies in galaxy evolution.Comment: 15 pages, 6 figures, A&A in pres

Optical (VRI) photometry in the field of the galaxy cluster AC 118 at $z=\mathsf{0.31}$