Regra Sunny 16
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
Sunny 16
About this calculator
The Sunny 16 Rule is a useful tool for photographers and photography enthusiasts who want to understand how to adjust the correct exposure in different lighting conditions.
It works by calculating the appropriate aperture speed for a given exposure time, based on the sensitivity of the film or camera sensor, expressed in ISO.
The formula behind the Sunny 16 Rule is simple: exposure time equals aperture speed divided by ISO value.
The Sunny 16 Rule is particularly useful in high-light situations, such as clear and overcast skies, and helps ensure the image has the correct exposure and no excessive light.
Frequently asked questions
What is the Sunny 16 Rule?
The Sunny 16 Rule is a simple formula to calculate the correct exposure in different lighting conditions. It helps ensure the image has the correct exposure and no excessive light.
When should I use the Sunny 16 Rule?
The Sunny 16 Rule is particularly useful in high-light situations, such as clear and overcast skies. It can also be used as a general guideline to adjust exposure in different lighting conditions.
How can I apply the Sunny 16 Rule in my photography practice?
To apply the Sunny 16 Rule, you need to know the sensitivity of your film or camera sensor (ISO), as well as the aperture speed of your lens. With this information, you can calculate the correct exposure using the formula.