HST Advanced Camera Observations of the Hubble Deep Fields

The HST Advanced Camera (ACS) provides survey capability for characterizing distant galaxies that is ~10X better than WFPC2, through its greatly increased sensitivity, areal coverage and improved spatial resolution. The SDSS filter set also provides new opportunities for the study of distant galaxies --- for example, the detection of galaxies at very high redshifts through ``dropouts'' using the red `i'and `z' filters. Early observations of the HDF-N and HDF-S are being taken to tie the ACS data into the vast array of observations already carried out on the HDFs, and to demonstrate the capabilities of the ACS in this area. The first observations of the HDF-N and HDF-S will be shown. The support of NASA and the efforts of the HST project and Ball (BATC) will be acknowledged.