  We describe the technique of absorption line imaging of galaxy disks using
the Taurus Tunable Filter on the Anglo-Australian Telescope and demonstrate its
sensitivity to the behaviour of spectral features associated with Mg and Fe.
Radial profiles of Mg2 and Fe5270 line-strengths are presented for a sample of
eight face-on spiral galaxies spanning a range of Hubble types. Signatures of
phenomena including merger-induced star formation, HII rings and galactic bars
are also reported. This study demonstrates the capacity of tunable filters to
measure Mg and Fe line-strengths across the face of spiral galaxies, which can
ultimately reveal clues about the star formation history and chemical
evolution.
