photographic and optical apparatus and instruments in the nature of photographic objectives and their parts, namely, protective lens covers, [ adapter rings for attaching objectives to cameras, ] and lens hoods; photographic lenses and their parts, namely, lens hoods, lens caps and plastic rings with numbering to indicate aperture, focus and f-stop; [ photographic accessories, namely, camera side grips and photographic exposure meters; ] lenses for cameras; [ optical lenses and their parts, namely, adaptors for attaching photographic lens to cameras; range finders for cameras; telescopes and their parts; microscopes and their parts; photographic viewfinders; optical filters in the nature of light filters and polarization filters; polarimeters; optical measuring and testing instruments, namely, photometers and photographic exposure meters; apparatus for light and color radiation measuring, namely, photometers and colorimeters; photographic apparatus for recording and reproduction of images, and replacement parts therefor, namely, analog and digital cameras, photographic exposure meters and photographic exposure calculators; flashlights for use in photography; photographic shutters, namely, slide shutters, central shutters, leaf shutters, focal plane shutters, and adjustable stray light apertures for cameras ]