Olympus's automatic half-frame Pen EE — 28mm f/3.5, selenium auto-exposure, fixed focus, 1961.
The Olympus Pen EE was a half-frame viewfinder camera from Olympus, launched in 1961 as the automatic, point-and-shoot member of the Pen family that Yoshihisa Maitani started in 1959. The EE (Electric Eye) simplified the earlier manual Pen into a fixed-focus, auto-exposure camera aimed at everyday snapshooters, and it became one of the most widely produced Pen models.
Half-frame format means each 24x36mm span of 35mm film holds two 18x24mm images, so a 36-exposure roll gives around 72 pictures. It has a fixed 28mm f/3.5 D.Zuiko lens with fixed focus (deep depth of field rather than adjustable focusing), and a selenium light meter ringing the lens that drives automatic exposure with no battery required. The shutter is a simple two-speed leaf mechanism selected by the meter, and a red flag appears in the finder to warn of insufficient light. The lens is not interchangeable.
The EE is a grab-and-go camera: point, frame in the bright optical finder, and shoot, with the meter handling exposure automatically. Its fixed focus and compact body suit travel and casual street photography, and the doubled frame count makes it economical for holiday and everyday snapshots. There are no manual controls, so it favours simplicity over creative override.
On the used market the key check is the selenium meter, which powers the automatic exposure: these cells fade or die with age and cannot be replaced with a battery, so a dead cell leaves the auto system inoperative. Verify the meter responds to light and the shutter fires, inspect the lens for haze and fungus, and check the light seals and finder for perishing. Confirm the film-wind and counter work and that the low-light warning flag operates.