Just wondering.....
If photocromatic lenses are not good because they don't get lighter fast enough when encountering cloud layers....how about the rest of regular sunglasses that don't change at all....Would those be better?
Serengeti's also have a what they call gradient lenses in which the bottom part of the lense has a lighter tone than the top improving your instrument view in this type of situations...
.....just my 50 cents.
Scube