  We calibrate the photographic photometry of the revised New Luyten Two-Tenths
catalog (rNLTT) by matching 3448 rNLTT stars to the Sloan Digital Sky Survey
(SDSS). The correction is linear in magnitude and goes from zero at V ~ 14 to
0.32 mag at V=19, in the sense that rNLTT was previously too bright. The
correction implies that the underlying USNO-A2.0 photometry, on which rNLTT
photometry is based, is non-linear. The new calibration somewhat improves the
appearance of the (V,V-J) reduced proper motion diagram in the sense of better
separation between disk and halo stars. We repeat Gould's analysis of 5000 halo
stars in rNLTT. The most important change is to move the peak of the halo
luminosity function about 0.5 mag dimmer, from M_V=10.5 to M_V=11, putting it
into good agreement with the parallax-based determination of Dahn et al.
