The Nikonos IV, introduced in 1980, was a lightweight and fully waterproof underwater camera designed for both professional and enthusiast divers. It offered improved flash synchronization, refined controls, and continued the series’ reputation for rugged reliability. With easy-to-use operation and compatibility with high-quality lenses, the Nikonos IV made capturing sharp, vibrant images underwater more accessible than ever, solidifying Nikon’s standing in the world of underwater photography.