Klaus wonderful images
Thanks, I remember, we talked about that lens Fons
One of my currently most often used lenses.
Just in case that would be of interest, here are two albums with images I took using this lens:
https://www.flickr.com/photos/kds315/albums/72157656458555811 and
https://www.flickr.com/photos/kds315/albums/72157648961220894Prices on ebay for those are about 10x by now as they were before
Just one CAVEAT: they were designed for projecting 35mm film (18x23mm format, 30mm diagonal), so are not designed for FF sensors, they do fill the frame of course even at infinity, but with loss of IQ towards the outer parts; an effect which can be used very well for centered motives like flowers. The degradation of IQ is very smooth though. That lens resolves less than 20 micron in its corners, 10 micron center which is equivalent to a resolution of 50 lppm center / 25 lppm corner (lppm = line pairs per mm; Zeiss Jena data).
Shorter focal lengths cannot be adapted due to a too short BFL and from 119mm onwards speed is decreased to f1.9, 109mm and below are all f1.6. They all work very well up to infinity of course.
Three professionally converted ones, rightmost is mine. Leftmost has Canon EF and Nikon mount (exchangeable custom mounts with focus correction)