Nikon Nikonos I (Calypso/Nikkor)

Drop most cameras over the side of a boat and you own a brick. The Nikonos I goes under with you, to recreational depths, no housing, no o-ring case the size of a toaster. You hold the camera, the water touches the lens, and that is the whole arrangement. Almost nothing else in 1963 worked this way without a separate sealed box around it. The design came out of France, the Calypso built for Cousteau's team, and Nikon licensed it and fitted it with their Nikkor glass. For years if you wanted to shoot the reef, this or a clone of it was the camera.

Using it is an exercise in doing everything by feel and by guess. There is no rangefinder patch, no ground glass, no reflex anything. You scale-focus: you estimate the distance to your subject, you turn the focus ring to that number, and you trust it. The viewfinder is a simple optical box on top that shows you roughly what the lens sees, with parallax you learn to live with. Underwater everything looks closer and bigger than it is, so you correct in your head. It sounds primitive because it is, and divers loved it precisely because there was nothing fragile to flood.

The build is the whole point. The body seals by sliding apart: you pull the inner casting out of the outer shell to load film, and the o-rings do the rest. There is no battery in the body at all, since the camera carries no meter and no electronics; any cell you fed belonged to an external flash, not the camera. It feels like a tool, heavy and tight, the controls big enough to work with cold fingers or gloves. The focal-plane shutter runs from a full second up to about 1/500, with flash sync at 1/60, which mattered because below twenty feet your strobe is doing most of the lighting anyway.

So you are exposing blind. The Nikonos I never carried a cell of any kind. Light underwater is a moving target: it falls off fast with depth, it shifts blue, and an averaging meter would lie to you even if one were bolted on. You meter before you go down, or you bracket, or you read the surface and subtract for depth. Take an incident reading topside with the Zone Light Meter app, note how the light drops as you descend, and set the aperture by hand. That covers the gap the body left wide open.

Today the Nikonos I is the collector's pick of the line, the earliest and the rawest. Later Nikonos bodies added metering and got easier, so people who actually dive tend to grab a III or a V. The I gets bought by people who want the origin, or who want a land camera that shrugs off rain, surf, and sand. As an all-weather scale-focus 35mm that also happens to work submerged, it makes more sense than chasing it for the reef. The one real catch is the o-rings. Old grease, a hair, a grain of sand on the seal, and you have flooded a sixty-year-old camera. Service the seals before you trust it with water.