We report a magnetic neutron and x-ray scattering study of the correlation length and order parameter of the random-field Ising magnets ${\mathrm{Fe}}_{0.5}$ ${\mathrm{Zn}}_{0.5}$ ${\mathrm{F}}_{2}$ and ${\mathrm{Mn}}_{0.45}$ ${\mathrm{Zn}}_{0.55}$ ${\mathrm{F}}_{2}$ on field cooling. Fitting the inverse correlation length, \ensuremath{\kappa}, measured above the metastability temperature, ${\mathrm{T}}_{\mathrm{M}}$ (H) in ${\mathrm{Fe}}_{0.5}$ ${\mathrm{Zn}}_{0.5}$ ${\mathrm{F}}_{2}$ , at H=5 and 6 T to a power law yields the exponent \ensuremath{\nu}=1.5\ifmmode\pm\else\textpm\fi{}0.3 together with the equilibrium transition temperatures, ${\mathrm{T}}_{\mathrm{N}}$ (H), which are found to be well below ${\mathrm{T}}_{\mathrm{M}}$ (H). We also estimate \ensuremath{\gamma}=2.6\ifmmode\pm\else\textpm\fi{}0.5 and \ensuremath{\gamma}-bar=5.7\ifmmode\pm\else\textpm\fi{}1 for the connected susceptibility, \ensuremath{\chi}, and the disconnected susceptibility, ${\mathrm{\ensuremath{\chi}}}_{\mathrm{dis}}$ , exponents, respectively. The x-ray data reveal a long range ordered component coexisting with short range magnetic order in the field-cooled state, for weak random fields in both samples. The nucleation of the long range order occurs below ${\mathrm{T}}_{\mathrm{M}}$ (H). The intensity of the long range order component decreases with increasing field.