The SBF Survey of Galaxy Distances

We describe a method which measures surface brightness fluctuation (SBF) to determine galaxy distances. Comparisons between SBF distances and a variety of other estimators, including Cepheid variable stars, the Planetary Nebula Luminosity Function (PNLF), Tully-Fisher (TF), D(n) - sigma, SNII, and SNIa, indicate that the calibration of SBF is universally valid, and that SBF error estimates are accurate. The zero point given by Cepheids, PNLF, TF (both calibrated using Cepheids), and SNII is in units of Mpc; the zero point given by TF (referenced to a distant frame), D(n) - sigma, and SNIa is in terms of a Hubble expansion velocity expressed in km/s.