Nikonos IV-A, 1980, Underwater Camera, PhotoMuse Collection, 2015, Donation of Mr. Herbert Ascherman Jr.

Nikonos IV-A, an electronically controlled 35 mm focal-plane shutter type underwater camera, was introduced in 1980. Owing to its robust construction, it needs no additional housing for depths to 160 feet (50m). It can take interchangeable lenses. The most popular lens is the 35mm f/2.5 which may be used on land, sea, or air making…