Originally Posted by Steve Smith
Sunny 16 states that you use the closest shutter speed to 1/ISO. For ISO 100 this is 1/125.
It seems odd that Weston would have two standards for their own sensitivity scale.
Ah, well then we can easily talk about an ISO 125 film and be on the mark.
It is odd that Weston would have two scales, but it coincides with the old confusing charts and our experiments.