In this paper we present results of applying the shear-ratio method to the RCSLenS data .
The method takes the ratio of the mean of the weak lensing tangential shear signal about galaxy clusters , averaged over all clusters of the same redshift , in multiple background redshift bins .
In taking a ratio the mass-dependency of the shear signal is cancelled-out leaving a statistic that is dependent on the geometric part of the lensing kernel only .
We apply this method to 535 clusters and measure a cosmology-independent distance-redshift relation to redshifts z \mathrel { \raise 1.16 pt \hbox { $ > $ } \kern - 7.0 pt \lower 3.06 pt \hbox { { $ \scriptstyle% \sim$ } } } 1 .
In combination with Planck data the method lifts the degeneracies in the CMB measurements , resulting in cosmological parameter constraints of \Omega _ { M } = 0.31 \pm 0.10 and w _ { 0 } = -1.02 \pm 0.37 , for a flat wCDM cosmology .