I forgot I had this lens until recently. Now I'm really glad I kept all the equipment from my darkroom days. An adapter ring finally arrived from China to reverse mount the Rodenstock on my 200mm Micro-Nikkor.
I haven't figured out the magnification yet but, I'm guessing it's somewhere around 3.5x. To my eye it looks quite sharp and will allow me tofit a bit more of a dragonfly's head in the frame.
Have questions about the equipment used for macro- or micro- photography? Post those questions in this forum.