  We study the effect of a finite sample size, beam divergence and detector
thickness on the resolution function of a MIEZE spectrometer. We provide a
transparent analytical framework which can be used to determine the optimal
trade-off between incoming flux and time resolution for a given experimental
configuration. The key result of our approach is that the usual limiting factor
of MIEZE spectroscopy, namely neutron path length differences throughout the
instrument, can be suppressed up to relatively large momentum transfers by
using a proper small-angle (SANS) geometry. Under such configuration, the
hitherto accepted limits of MIEZE spectroscopy in terms of time-resolution are
pushed upwards by typically an order of magnitude, giving access to most of the
topical fields in soft- and hard-condensed matter physics.
