[en] Proton elastic-scattering cross-sections and analysing powers at 30 MeV have been used to derive optical-model parameters for ten elements from 10B to 32S. A set of average geometrical parameters (rsub(deg)=1.10fm,rsub(LS)=1.0fm and a1=0.60fm) is found to give good fits to the entire data, the other geometrical parameters being r1=(1.35+-0.15)fm, asub(deg)=(0.75+-0.10)fm and asub(LS)=(0.55+-0.07)fm. The dynamical parameters with fixed geometry are presented