Mens Sunny 16 Rule T-Shirt

The Sunny 16 Rule is a classic guideline in photography that helps you estimate proper exposure without a light meter. Here’s how it works: On a bright, sunny day, set your aperture to f/16.Then, set your shutter speed to the reciprocal of your film speed (ISO). 👉 Example: If your film (or digital ISO) is ISO 100, use 1/100 sec at f/16. If your ISO is 200, use 1/200 sec at f/16. From there, you adjust the aperture for different lighting conditions: Sunny (bright, harsh shadows): f/16, Slightly overcast: f/11, Overcast (soft shadows): f/8, Heavy overcast/shade: f/5.6, Sunset or very dim light: f/4 or wider. This rule works because daylight is fairly consistent in brightness, and it gives photographers a quick, reliable baseline when meters aren’t available.