Getting back into experimenting with lenses again!  The speedgraphic is amazing for this, shutter speeds up to 1/1000th!  Very hand for shooting large diameter lenses outside :-D  Sometimes holding up a sheet of ND filter are still required though. 

First two shots are from a Bausch & Lomb lens I aquired from Mr. Jim Galli, (thanks Jim, I'm enjoying it!)  the 3rd image is just an achromatic doublet stuffed into a piece of cardboard with a hole cut into it.  I don't quite like how the image just smears off the edge into space, I'll see about putting another element (probably another doublet, mirrored?) behind the first one to see if the edges will do something a bit more interesting.