Main Page | See live article | Alphabetical index In photography, the sunny f/16 rule is a method to obtain correct exposure without using a light meter. The basis of the sunny f/16 rule are 1. Set your shutter speed equal to your film speed. 2. Set f stop according to the following table : Aperture Lighting Conditions Shadow Detail f/16 Sunny Distinct f/11 Slight Overcast Soft around edges f/8 Overcast Barely visible f/5.6 Heavy Overcast No shadows This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.