Can anyone comment on subject lens (code 11606) image finger print with B&W film like Tri-X or FP-4. Is the earlier 28mm versions (#3 or #4) better with B&W? At the current prices $1400- 1500 this optic is the least expensive of the current lenses. What gives, a 28mm used to be more expensive? Why the big price jump between the 28/2.8 Asp and a 35/2 Asp?