Comparison of the V-band limb-darkening relation determined by Fields et al. (2003) from observations (black dashed curves with errorbars) with the limb-darkening relations computed from SAtlas model stellar atmospheres (red solid curves) and relations computed from Atlas model stellar atmospheres (blue dotted curves), represented using the same linear-plus-square-root law. The insert shows a magnified view of the region of the fixed μ-point.