The concepts of edge effect and micro-contrast would seem to have slightly different nuances. I like
certain film/dev combinations for enhanced edge effect, like HP5 sheet film in PMK pyro, with expanded development. But after that, I might choose to enhance micro contrast per se, esp in the
highlights, by use of an unsharp mask. This significantly improves the ability to hold micro contrast
through the whole scale of the subject, esp in the highlights. But edge effect stays the same unless
geater diffusion is applied to the mask, which can also be used to fine-tune this very effect. It all
depends on the degree of the magnification in the print as well. In small format, I find that Pan F
gives the best edge acutance, provided the scene will accomodate its relative short straight line.