The first wide ultracool binary dwarf in the field:   DENIS-J055146.0-443412.2 (M8.5 + L0)
  We present observations of a new very low mass field binary, discovered during an infrared imaging survey of 250 DENIS L and very late-M dwarfs. DENIS-J055146.0-443412.2 is an M8.5+L0 pair, with a physical separation of over 200 AU. This makes it the widest very low mass binary known in the field, by an order of magnitude. Such a system is fragile, and it would not have survived a close encounter with a third body. Its existence demonstrate that some very low mass stars/brown dwarfs form without ejection from a multiple system, or any other strong dynamical interaction. 
M. Billeres, X. Delfosse, J.-L. Beuzit, T. Forveille, L. Marchal, E.L.   Martin