The lens is about 75mm from front to "film plane", requiring an aperture of about 0.32mm for decent focus.  My hole is 0.34mm or there abouts..the smallest drill bit I had.  Then lens is pcv plastic pipe with a circle of aluminum pie plate glued to the end and the hole in that. The thing goes to the camera with gentle masking tape, the sort house painters may use.

Exposure is about 1 second, aperture is approximately f/220.   It might need to be smaller. 
Color version is obscene..all the color of the lens interior which is the only satin paint I had and was still shiny. Tomorrow, new tries with flat black paint inside to prevent reflections..we will see.   Dust is a problem of true concern..having heard sensors attract dust like bees to pollen. I would suggest a cheapie and small UV filter taped over the aperture hole and care is placing the lens to the cam.  So much for this...like I said, way down the ladder from the previous images.          TomDart.