  In the context of tomographic cosmic shear surveys, there exists a nulling
transformation of weak lensing observations (also called BNT transform) that
allows us to simplify the correlation structure of tomographic cosmic shear
observations, as well as to build observables that depend only on a localised
range of redshifts and thus independent from the low-redshift/small-scale
modes. This procedure renders possible accurate, and from-first-principles,
predictions of the convergence and aperture mass one-point distributions (PDF).
We here explore other consequences of this transformation on the (reduced)
numerical complexity of the estimation of the joint PDF between nulled bins and
demonstrate how to use these results to make theoretical predictions.
