It's base 10. That base to the .3 power = 2, to the .6Originally Posted by Helen B
power = 4, to the .9 power = 8, and on, doubling the value
with each additional .3.
More often than not exposure is not in the log format. I also
see EVs, ZONEs, and STOPs. I think 1, 2, 4 , 8, 16, 32, and on
would also due.
Perhaps the log format is used because of it's mathematical