  We present here results from a deep spectroscopic survey of the Coma cluster
of galaxies (29 galaxies between 18.98<m_R<21.5). Only 1 of these galaxies is
within Coma compared to an expected 6.7 galaxies computed from nearby control
fields. This discrepancy potentially indicates that Coma's faint end luminosity
function has been grossly overestimated and raises concerns about the validity
of using 2D statistical subtraction to correct for the background galaxy
population when constructing cluster luminosity functions.
