(V, B − V) CMDs of the Carina dSph at different radius from the centre, as shown in Fig. 1. The [Fe/H] determinations of individual RGB stars from Starkenburg et al. (2010) are also shown as large coloured circles, with colour indicating the [Fe/H] abundance. The average photometric error at each magnitude level are represented by the horizontal error bars and the 50% completeness level is indicated by the solid (blue) line. Furthermore, the red line indicates the colour limit for lower RGB stars associated with Carina.