What is the difference between a stop and a step in OpenEXR? Steps seem like sub-units of stops but beyond that I;m not sure of their relation.
From the Technical Introduction:
The range of normalized 16-bit floating-point numbers can represent thirty stops of information with 1024 steps per stop. We have eighteen and a half stops above middle gray, and eleven and a half below. Denormalized numbers provide an additional ten stops at the low end, with gradually decreasing precision.