  Radio continuum emission from the supernova remnant G296.5+10.0 was observed
using the Australia Telescope Compact Array. Using a 104 MHz bandwidth split
into 13 x 8 MHz spectral channels, it was possible to produce a pixel-by-pixel
image of Rotation Measure (RM) across the entire remnant. A lack of correlation
between RM and X-ray surface brightness reveals that the RMs originate from
outside the remnant. Using this information, we will characterise the smooth
component of the magnetic field within the supernova remnant and attempt to
probe the magneto-ionic structure and turbulent scale sizes in the ISM and
galactic halo along the line-of-sight.
