I would like something sharp. Most of the portraits I would take would probably be head shots and from the midsection up. Although I could use the soft focus on the 150mm I really need a lens to be sharp at all stops for closeup work such as still life objects and non macro detail work such as tree bark etc. I wish one could use the 150 without the soft focus disks while still maintaining sharpness but that is not the case. One of my main subjects is cemeteries and I need to isolate headstones and monuments from cluttered backgrounds while maintaining maximum sharpness.