The fractional gradient point for the ISO contrast parameters falls just about a stop below the 0.10 Fb+f speed point. This means that there is a one stop safety factor to account for variations in camera exposure, but also variations in flare.
Originally Posted by Stephen Benskin
Most people are familiar with the story behind Ansel Adam's Moonrise Over Hernandez. It is arguably considered his best work. It was very underexposed. The beautiful prints he was able to create are a more a testament to his skill as a printer and his eye as an artist than to his exposure technique.
Part of what I find truly special about using negative film is the flexibility and the "built in" safety factors.