The Lynx is a family of rangefinder cameras made by Japanese company Yashica from the early-1960s with coupled and fixed lenses.
Light is metered using a small selenium photovoltaic cell behind a lens array, powering a galvanometer.
The film speed for the metering system can be set from 10 to 800 ASA.
It was an upgrade to the Lynx 1000 and replaced the photovoltaic cell with a cadmium sulfide (CdS) photoresistor, requiring a mercury battery for the light meter.
These variants both switched to two PX640 batteries instead of a single PX625 in order to drive a more sensitive light sensor with a higher voltage.