The two crossword solutions for the term 'Olympus Rival' are Nikon (5 letters) and Leica (5 letters). Nikon is a Japanese multinational corporation specializing in optics and imaging products, while Leica is a German optics company that produces cameras, lenses, binoculars, rifle scopes, microscopes, and ophthalmic lenses. Both companies are well-known for their high-quality cameras and lenses, and have been rivals of Olympus in the camera industry for many years.