The Sunny 16 Rule helps film photographers to approximate correct daylight exposures without a light meter.
Sunny 16 Explained
Set the Shutter Speed to the closest match to the film ISO on a sunny day and select an Aperture from the table below.
|f/22||Snow or Sand|
|f/4||Shade or Sunset|
For example, on a sunny day:
- With ISO 100 film, set the Aperture to f/16 and the Shutter Speed to 1/100.
- With ISO 400 film, set the Aperture to f/16 and the Shutter Speed to 1/500.
You can use The Sunny 16 Rule to help you choose the suitable ISO film to use or if you should even shoot at all, depending on what equipment and film you have.