Property Value
Value in log base 2 seconds. In other words, for values less than zero, the exposure time is 1/2^n seconds, and for values zero or above, the exposure time is 2^n seconds.
For example:
Value Seconds
-3 1/8
-2 1/4
-1 1/2
0 1
1 2
2 4
For example:
Value Seconds
-3 1/8
-2 1/4
-1 1/2
0 1
1 2
2 4