Most lighting fixtures assign two DMX channels to the focus parameter allowing for a very fine 16-bit resolution of control. When you are dialing in the focus on something you want perfectly sharp, you might need to switch to a fine or ultra fine control of the parameter. This way, you can get the best clarity possible for a corporate logo or other specific image. Each console has a different method for fine adjustment, so be sure to familiarize yourself with your desk’s methodology.
-Brad Schiller, from “Feeding the Machines,” PLSN, Oct. 2019, page 81
