PEN

The introduction of the Olympus PEN marked the beginning of the success story of Olympus as manufacturer of small innovative cameras. It runs parallel with the success story of its designer: Yoshihisa Maitani.
His first assignment for Olympus was to design a small, affordable quality camera. The result, the first PEN, was originally not produced by Olympus but when it turned out to be a very popular camera Olympus took production in its own hand, changed the model to PEN S, and many models were to follow.
They all had one thing in common: a very pocketable size, using the half-frame (18x24mm) 35mm film format. This allows twice the number of shots on one roll, up to 72!
The original PEN had a fixed Zuiko 28mm/F3.5. For half-frame this is a semi-wide lens (the equivalent of a 35mm lens on full frame). The PEN S, which was the first PEN made by Olympus, used a Zuiko 30mm/F2.8. The PEN W used a semi wide angle Zuiko 25mm/F2.8.
None of these models had a built-in meter.