I found your post doing a search for the history of this company. Thank you much for your great photos and description of the history. I picked up a Pentacon 30 a couple of years back, now running it on M43 and a Canon M50, both with focal reducers. I have grown very fond of this lens, which I picked up very reasonably (30USD) because of a bent filter ring, straightened out the ring, added a filter, since trusting the filters threads more. This lens has character, So many of the digital lenses seem antiseptic comparatively, the background blur is amazing, and the colors are great, as your photos show so nicely.