I was playing around with the Sigma fp today and decided to give the monochrome setting a try. In a sub-menu there are settings for sharpness and contrast that can be set just for that profile. Additionally, there is a "tone" button on the rear of the camera that gives you the opportunity to create custom curves that work on all the profiles. I tried combinations of both setting banks and ended up with some interesting stuff.
These images were shot with the Sigma fp + 45mm f2.8 lens. I tried a different approach today and instead of working close to wide open I worked closer to stopped down. Most of the shots done today were executed at f8 and f11. It required a bit more camera supervision to make sure I stayed within the realm of hand-hold-ability but that's okay; I wasn't moving too fast.