Quote Originally Posted by Fred Aspen View Post
I don't know what the units are on the Weston (I have heard it is foot candles and my Sekonic 398A has a scale in foot candles) but both the Weston and the 398A say a bright sunny day in UT will be very close to 350 'units' (actually the Sekonic measured about 400).
If you set the Weston to ISO 100 (or Weston 80) and set it for a reading of 400 it will give the standard sunny 16 combination of f16 and 1/125 so perhaps the Weston is scaled in foot candles.