A replacement 4 1/2" lens cone for 150mm lenses. This is not exactly like the original but does mostly the same thing. It is missing a way to mount the original under lens filter arm (I am working on a version that will - if interested, please contact me). Comes with M3 mounting screws, nuts and a lens plate.
Omega lens plates should work but I know the 3D printed one works so I am including one just in case. Unless specified it will have a 42mm opening.
Example image with the lens shows how things look with a 150mm lens and lens plate attached (lens is not included).