I have chosen for this filter, because I did not want to lug around a whole set of different filters with me. And I've already anticipated that the darkening may not be as uniform as in filters with fixed values. The article has therefore surprised me positively. The filter darkens my feeling evenly over the entire surface. The setting is really very large. Color casts or similar negative effects I could not tell. Only the printed scale on the edge does not match the actual setting. So I can but live well.
