X-Act2 / Novoflex Balpro 60mm Extension tube - Used
This is an approximately 60mm Extension tube lens board that will fit the X-Act2 and Novoflex Balpro technical cameras. I did not measure it, but it seems to be a copal 1 opening which would be standard for the Rolleiflex electronic shutters.
Used but in very good condition. I've never seen one of these before.