The price of the intermediate rings is good - the function they fulfill as desired. The Sony standard zoom 18-55mm has been always reliably detected and thus supports the automatic functions. The fit is also okay (rings could sit a bit tighter). So what should I emphasize? It is possible that the apparent disadvantage that the intermediate rings "only" made of plastic, for me, which she often drags for walking, are very beneficial as they are very light.
