Hi,
I do not know whether it has been mentioned before, but in one of those Pentax lens booklets from the 70s, Pentax claims that the K150/f4 was "one of the best medium telephotos on the market".
Arnold
In an older Asahi booklet, the Super-Takumar 150mm, probably version 1, was described as being very good for close-ups (with tubes). That was before the 100/4 bellows came out, so it made sense, then, to have such a lens. Some medium tele lenses were available for that purpose from a few makers (Minolta, Novoflex and others).
In a book on macros, the Tokina 200/3.5 was also said to be a good performer at close-up distances.
Andre
