The term Nikon Competitor refers to four different companies: Leica, Ricoh, Pentax, and CANON. Leica is a German company that produces cameras, lenses, binoculars, rifle scopes, and other optical products. Ricoh is a Japanese company that specializes in imaging and electronics products. Pentax is a Japanese company that manufactures cameras, lenses, binoculars, and other optical products. CANON is a Japanese multinational corporation that specializes in imaging and optical products. All four of these companies are competitors of Nikon, a Japanese multinational corporation that specializes in imaging and optical products.