Pentax ME Super with Pentax-M 50mm f2  type_Lens & Sensor Cleaning This viewfinder is compatible with

This viewfinder is compatible with the automatic parallax adjustment system on many Canon rangefinder cameras

while it only has the single shutter speed and literally no other features

which takes actual 3D pictures and displays them- in actual 3D

Lomography x Zenit 50mm f1

Little bit more exotic

Pentax ME Super with Pentax-M 50mm f2 &nbsptype_Lens & Sensor Cleaning This viewfinder is compatible withThe Pentax ME Super is a compact, manual focus 35mm SLR camera with manual or aperture priority autoexposure. Accurate metering and shutter, with new light seals. In excellent condition, with only very minor finish wear. Includes a clean SMC Pentax M 50mm f2 lens.