Twittern Buy RING CAP GN-1 (BLACK) - Options RING CAP GN-1 Blue (Ref.: 37824) Buy This is an exclusive replacement ring cap. It features a blue metallic finish to dress up your camera. RING CAP GN-1 Dark grey (Ref.: 37823) Buy This is a replacement ring cap. It features a dark gray metallic finish to dressing up your camera. ● Image features the ring cap on the GR III. RING CAP GN-1 Black (Ref.: 37819) Buy This is the same ring cap as the one that attaches to the camera body, in the same black coloring. ● Image features the ring cap on the GR III.