  In this paper we present recent Low Frequency Array (LOFAR) observations of
the pulsar J1740+1000. We confirm that its spectrum has a turnover at 260 MHz,
which is unusual for a typical pulsar. We argue that in this case
interferometric imaging provides more accurate pulsar flux estimates than
other, more traditional, means such as beamformed observations. We conclude
that existing calibration and imaging techniques can be used for a more
comprehensive study of the influence of the interstellar medium on the
point-like sources at very low frequencies in the near future.
