The eyecup itself is functioning properly. Only unfortunately does not differ much from the original Eyecup DK-21, which is when you buy the camera with us. It's a bit wider and know a little more rubber on, but that's about it. With all other Nikon cameras that I had previously, there was an optional eyecup, which would allow a closer match to the eye of the beholder. They were more curved outwards and therefore could reduce lateral light much better. In this eye cup that is hardly the case. That should probably be interesting for eyeglass wearers, which this eyecup likely also offers little comfort.