Precision CCD uvbyCaH{beta} photometry is presented of the old cluster, M67, covering one square degree with typical internal precision at the 0.005-0.020mag level to V~17. The photometry is calibrated using standards over a wide range in luminosity and temperature from NGC752 and zeroed to the standard system via published photoelectric observations. Relative to NGC752, differential offsets in reddening and metallicity are derived using astrometric members, supplemented by radial velocity information. From single star members, offsets in the sense (M67-NGC752) are {delta}E(b-y)=-0.005{+/-}0.001(sem)mag from 327 F/G dwarfs and {delta}[Fe/H]=0.062{+/-}0.006(sem)dex from the combined m1 and hk indices of 249 F dwarfs, leading to E(b-y)=0.021{+/-}0.004(sem) and [Fe/H]M67=+0.030{+/-}0.016(sem) assuming [Fe/H]Hyades=+0.12. With probable binaries eliminated using c1, (b-y) indices, 83 members with ({pi}/{sigma}{pi})>50 generate (m-M)0=8.220{+/-}0.005(sem) for NGC752 and an isochronal age of 1.45{+/-}0.05Gyr. Using the same parallax restriction for 312 stars, M67 has (m-M)=9.77{+/-}0.02(sem), leading to an age tied solely to the luminosity of the subgiant branch of 3.70{+/-}0.03Gyr. The turnoff color spread implies {+/-}0.1Gyr, but the turnoff morphology defines a younger age/higher mass for the stars, consistent with recent binary analysis and broadband photometry indicating possible missing physics in the isochrones. Anomalous stars positioned blueward of the turnoff are discussed.

Cone search capability for table J/AJ/165/105/table1 (Merged photoelectric secondary standards in M67)

Cone search capability for table J/AJ/165/105/table2 (Internal photoelectric hk secondary standards in M67)

Cone search capability for table J/AJ/165/105/table4 (Stromgren photometry in M67)