It's got less to do with the grinder itself than it does with grind size and level of filtration. Finer membrane filters will reduce the fines, but generally it's not something you should worry about that much. It's not a problem to correct for or anything like that. The only issue you'll get from fines in the coffee is that they continue to extract as the coffee sits. This is one of the reasons that a hot cup of coffee left to sit for an hour will taste very over extracted.
10/29/14 at 12:06pm