  The proton structure function F2 has been measured in the range 0.045 GeV2 <
Q2 < 0.65 GeV2 and 6*10**-7 < x < 1*10**-3 using 3.9 pb-1 of ep->eX reactions
recorded with the ZEUS detector in 1997. The analysis is based on data from the
Beam Pipe Calorimeter (BPC) and the Beam Pipe Tracker (BPT). Compared to our
previous analysis, the BPT permits improved background suppression and better
control of systematic uncertainties, allowing the extension of the kinematic
region of the measurement towards lower Q2 as well as higher and lower y.
Significant improvements have also been achieved in the simulation of the
hadronic final state via a mixture of samples of non-diffractive and
diffractive Monte Carlo events, generated by the programs DJANGO and RAPGAP.
