This super telephoto lens is HFS100300 powerful, with a net amazing picture quality! Easy to use even if the zoom ring and a little harder (lègère difference) to turn on the normal lens, for me it does not interfere with anything, it's downright telephoto stunning! Installed on my lumix gh2, it gives, telephoto satisfied impressionant.Très for me ^^ Very good product I recommend it. I would put a 5/5.