Optical nikon together ring gun case has a lot of game, and I'm nice. The thing seen on the net is to put small plastic wedges so that everything fits well. it works but if we had not a ring for each optical nikon (once the ring on the lens and all mounted on the housing, remove the lens and his ring in order to remove the ring and put it on another optical, therefore, an optical ring .. =) is well galley everything back quickly. Focus ok confirms the diaph hangs to 1.4 in the LCD of the case at all stops of latitude below.