We present new photometric V- , R- and I-band data for the rich galaxy cluster AC 118 at z = 0.31 .
The new photometry covers an area of 8.6 \times 8.6 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 aimed at studying galaxy evolution through the color-magnitude relation and the fundamental plane .
We provide a catalogue including all the sources ( \mathrm { N } = 1206 ) detected in the cluster field .
The galaxy sample is complete to \mathrm { V } = 22.8 mag ( \mathrm { N _ { gal } } = 574 ) , \mathrm { R } = 22.3 mag ( \mathrm { N _ { gal } } = 649 ) and \mathrm { I } = 20.8 mag ( \mathrm { N _ { gal } } = 419 ) .
We give aperture magnitudes within a fixed aperture of 4.4 arcsec and Kron magnitudes .
We also give photometric redshifts for 459 sources for which additional U- and K-band photometry is available .
We derive and discuss the V- and R-band luminosity functions .
The catalogue , which is distributed in electronic form , is intended as a tool for studies in galaxy evolution .