Suppose there is a radially free falling object starting at r(t=0) = r0 > rS with some initial velocity v. And suppose there is a radial light ray starting at R(t=0) = R0 > r0. Suppose that both the object and the light ray reach the singularity at the same time. Question: is there a simple expression to calculate R0 in terms of r0 and v? In other words: from which radius R0 must a radial light ray start in order to reach the singularity together with a radial free fall observer starting at r0 with initial velocity v? Another equivalent question: which maximal sphere defined by R0 can be observed by an astronaut falling towards the singularity starting at starting at r0 with initial velocity v?