Printed on the Inside of a Box of Kodak Plus-X pan, ASA 125:
Set your camera or meter to ASA 125 (if it has a meter) and shutter speed to 1/125 second.
Bright or hazy sun on light sand or snow f/16
Bright or hazy sun (distinct shadows) f/11—use f/5.6 for backlit close-up subjects
Weak, hazy sun (soft shadows) f/8
Cloudy bright (no shadows) f/5.6
Heavy overcast/open shade f/4—subject shaded from the sun but lighted by a large area of clear sky