  For observed galactic microlensing events only one fit is usually presented,
though, especially for a binary lens, several fits may be possible. This has
been shown for the MACHO LMC#1 event (Dominik & Hirshfeld 1996). Here I discuss
the strong binary lens events OGLE#7 and DUO#2. It is shown that several models
with a large variety of parameters are in accordance with the photometric data.
For most of the fits, 1-sigma-bounds on the fit parameters are given. The
variation of the parameters within the bounds is in some cases considerable. It
is likely that other binary lens systems which will occur will have properties
similar to the discussed events.
