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Another standout feature of the Pen EES-2 is its fully automatic exposure control which intriguingly does not require batteries. Instead, this camera is powered by light. Using a mechanical system integrated with a selenium light meter, the camera automatically adjusts aperture settings based on available light, making it exceptionally user-friendly. If the light is insufficient, a mechanical interlock prevents the shutter from releasing.
This design enhances the point-and-shoot functionality of the camera, making it an excellent choice for those who may not have mastered the technical complexities of manual camera adjustments. With a simple shutter press, photographers can capture a well-exposed image without overwhelming themselves with settings.