KODAK
To get good pictures, the film in your camera needs to be exposed to the same quantity of light for every picture.
On a normal sunny day, you will use a fairly fast shutter speed and a medium lens opening so that the correct amount of light will reach the film and you will get a properly exposed picture.
1/250 sec, f/11
On a cloudy day, the light isn’t as bright and you need to either let light into the camera for a long time,
1/30sec, f/11
or let in a lot of light for a shorter time.
1/500 sec, f/2.8
Or possibly
1/60 sec, f/8
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