Quote Originally Posted by Oren Grad View Post
This makes no sense in purely mathematical terms. By definition, the expected value will never be the smallest grain size unless the grain is uniform in size. And in that case, talking about the "average grain size" is superfluous.
A little clumsy wording on my part. Edit "smallest" to "smaller" and it makes perfect sense to me.

I am trying to say one sets the aperture to match the average size of the grain. I was trying to exclude any large grain clumps from being included in the average.

Thanks,

Tim