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A consensus on the origin of the different stellar populations in NGC2808 has not been reached yet. Previous findings are based on data for a few small fields centered on the cluster (HST) or for a field of view covering about half the tidal radius (ground). There is now the need for deep photometry covering the entire cluster (tidal radius rt r_t ~ 16 arcmin) 
with the accuracy necessary to enable the identification of the different main sequences. This photometric catalog would allow the homogenous study of the multiple populations in NGC2808 and possibly a clear understanding of the origin and evolution of this peculiar globular cluster.

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