Sunny-16 Rule

Sunny-16 RUle

The Sunny-16 rule has roots going clear back to at least the 1920s if not earlier. Today, many people find the rule to be outdated. After all, nearly all cameras built from the 1960s forward had some sort of light meter built in. Standalone handheld meters also exists and there are even light meter apps that you can get for your phone.

So why are we taking the time to learn it?

Because it just works. This is handy because we have students with many different types of cameras and meter modes With the Sunny-16 rule, kids can get out and start getting properly exposed photos in minutes, rather than needing individualized lessons on their meters.

When learning about equivalent exposures and manual camera operation the Sunny-16 rule is very simple to learn and get approximately the correct exposure to start.

The rule starts simple. Your shutter speed should be 1/ISO. From there, you can go outside and just look at the weather conditions or shadows to set your aperture. Use the following table:

f/22 – snow or sand

f/16 – bright sun

f/11 – slight overcast

f/8 – overcast

f5/6 – dark overcast (no shadows on the ground)

f/4 – open shade/dusk

If you’re back-lighting, just add one stop.

Example: If I am shooting at 200 ISO on a cloudless afternoon in the middle of a grassy field, your settings would be 200 ISO, 1/200th shutter speed, and f/16.