Red has published an in-depth article on how to use low-contrast filters to enhance your story.
From the article:
A low contrast or “LowCon” filter is a technique used by some cameras and cinematographers to reduce the appearance of subject contrast and soften highlights. In this article, we examine the mechanism and relative trade-offs behind these filters.
A low contrast filter is typically placed in front of a lens, but can also be an extra fixed layer in front of the camera sensor. It works by inducing veiling flare, usually similar to but much subtler than adding a thin layer of petroleum jelly to the front of a lens. LowCon filters are therefore often grouped with “mist” or “fog” filters.
Read the full article here.