A Quick “Sunny f16” Summary
As long as the sun is high in the sky and not obscured by clouds, haze, smoke, dust, or other particulates in the air, it is a constant light source. That is why the Sunny f16 rule usually works in spring, summer, fall, and also winter as long as there isn’t any snow on the ground. (If there is snow on the ground, read this article.) The Sunny f16 rule, also known as Basic Daylight Exposure (BDE), (or the “fig” rule because f16 hand written looks like the word fig), is pretty simple.