Photographic Cameras, Telescopes, Binoculars, and Lenses, Parts of Aforementioned Articles, Adapter Lens Rings for Close-Up Photography, Adapters for Microscopic Photography, Adapters and Housings for Underwater Photography, Lens Hoods, Reflex Mirror Boxes, Filters, Developing Tanks, Printers, Enlargers, Driers, Film Magazines, Range Finders, Copying Apparatus, Tripods, Universal Heads, Flash Guns, Electronic Flash Units, Light Reflectors, Slide Projectors, Projection Screens, Viewers, Cutters, Film Mounts and Editors and Exposure Meters