Ricoh XR-1

Ricoh XR-1 35mm film SLR camera with Revuenon 1.2/55mm MC lens, Pentax K-mount.

Released in late 1977, the XR–1 is Ricoh's first SLRs to use K-mount lenses.

The XR-1 match-needle light meter operates with two 1.5v silver-oxide batteries, using three CdS photocells (pentaprism housed) TTL full open metering for center-weighted average light reading coupled to shutter speeds, film speeds and F-stops.

The vertically-traveling, Copal FC-523 all–metal focal-plane shutter is entirely mechanical with speeds from 1 to 1/1000 sec. and a 1/125 flash sync speed.

Ricoh XR–1 features multiple-exposure function, using the “M.E” button on the rear of the camera, below the wind lever – pressing the “M.E” button while winding the shutter, cooks the shutter but does not advance the film, which lets you take as many multiple-exposure as needed.

The currently selected lens f/stop is projected inside the viewfinder via prism through the window above the lens aperture.

XR–1's Field of view covers 93% and features diagonal split-image spot in micro–prism band surrounded by Fresnel field.

The built-in 10 seconds Self-timer is coupled with a mirror lock-up:

1. lift–up and locks the mirror in place
2. waits 10 seconds
3. releases the focal-plane shutter to expose the film
4. returns the mirror