Ключевые слова: background, backgrounds, binocular, binoculars, black, closeup, color, concepts, discovery, equipment, field, glass, instrument, isolated, lens, looking, magnifying, material, metal, military, nobody, object, old, one, optical, retro, search, searching, single, spy, strap, strategy, studio, surveillance, technology, telescope, travel, view, watching, white, zoom,