Normalised magnitude distributions for two different background galaxy sample selections. We compare the magnitude distribution of galaxies in the field as compared to those within the fields of galaxy clusters. Field galaxies are from random points within the survey footprint. Top: Combined High-z and Low-z galaxy sample selection. Bottom: Photo-z selection. For comparison we add on the figure the shifted field galaxy magnitude distribution. This shift mimics the effect of weak-lensing magnification by the galaxy clusters upon their background galaxies. The error bars are Poisson noise from the discrete number of galaxies in each magnitude bin.