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We present the analysis of high resolution spectra of six red giant stars inthe old open cluster Collinder 261. Reddening values for individual stars,derived from the relation between colours and temperatures (deduced from ourfully spectroscopic analysis) are consistent with previous determinations basedon photometry. For this cluster we derive an iron abundance of [Fe/H] = -0.03+/- 0.03. We also obtain the abundances of light metals (O, Na and Al),alpha-elements (Mg, Si, Ca, Ti), elements of the Fe-group (Sc, Cr, Mn, Co, Ni)and the neutron-capture element Ba. No intrinsic star-to-star scatter ispresent in any of these elements within our sample. We compare our findingswith previous investigations on this cluster, discussing in detail differencesin analysis methods and results.Comment: 11 pages, 5 figures, accepted for publication on Astronomy &  Astrophysic

High-resolution spectroscopy of the old open cluster Collinder 261: abundances of iron and other elements