  I present a novel method for measuring lens masses for microlensing events.
By combining a measured lens flux with the microlens parallax vector pi_E, it
is possible to derive the mass of the lens system without knowing the angular
size of the Einstein ring, theta_E. This enables mass and distance measurements
for single, luminous lenses, as well as binary and planetary lenses without
caustic crossings. I discuss applications of this method in the contexts of the
Spitzer, Kepler, and WFIRST microlensing missions.
