Originally posted by RICHARD L. Personally, I have a 67 M* 300 mm f/4, bought new many years ago. I used it on my Pentax 67 II with great success. There is a tripod mount built-in and the lens is quite heavy per se. I'm sure optically it blows away any 645 FA 300 mm offerings though, as it uses only the central portion of the 90 mm diameter illuminated field on a 645Z digital camera.
Regards
Richard, do you have real test results to back that up? The 645 A* 300 (then lens discussed in this thread—not the FA) is justifiably famous as one of the best in the line.
Covering a larger image circle doesn’t make a lens sharper in the middle, by the way. In fact, in my experience it’s the reverse.
Rick “who knows what this lens can do” Denney