  We study some Huybrechts and Lehn framed sheaves on the Fano 3-fold given by
blowing-up the 3-projective space at a point. In contrast with the cases of
curves and surfaces, there are very few examples in higher dimensions. In this
notes we give a new example of such pairs in dimension 3 and prove that the
moduli space under study is fine, quasi-projective and unobstructed.
