KODAK
All cameras have three basic settings. They are:
Shutter Speed
Lens Opening
Focus
To get a good picture, you need to adjust the shutter speed and the lens opening settings to control the amount of light entering your camera.
The shutter speed controls the length of time the shutter will stay open to allow light to reach the film.
A slow shutter speed lets light in to expose the film for a long time.
1/125 sec, f/11
A fast shutter speed lets light in to expose the film for a short time.
1/1OOO sec, f/11
The lens opening controls how much light will enter the camera while the shutter is open. A large lens opening lets in a lot of light.
f/4
A small lens opening lets in a small amount of light.
f/16
4