  We report K2 observations of the eclipsing cataclysmic variable V729 Sgr
which covered nearly 80 days in duration. We find five short outbursts and two
long outbursts, one of which shows a clear plateau phase in the rise to maximum
brightness. The mean time between successive short outbursts is ~10 d while the
time between the two long outbursts is ~38 d. The frequency of these outbursts
are unprecedented for a CV above the orbital period gap. We find evidence that
the mid-point of the eclipse occurs systematically earlier in outburst than in
quiescence. During five of the six quiescent epochs we find evidence for a
second photometric period which is roughly 5 percent shorter than the 4.16 h
orbital period which we attribute to negative superhumps. V729 Sgr is therefore
one of the longest period CVs to show negative superhumps during quiescence.
