Hello, 

I am trying to place a lens after the prism in  a system containing a tilted mirror at an angle, followed by a non-sequential component(prism), but as the value of radius is inserted there is a sphere of that certain radius, irrespective of the semi aperture diameter. and there is also a star marked on clear- semi diameter.

I am attaching a screenshot for your reference. If any more information is required to understand the problem , please let me know.

Please guide me on how to resolve this issue, with an explanation on why such a problem arises.