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When the shutter button is pressed, the aperture begins to open. In auto mode, if there is intense light, the aperture opens less. It’s a gradual adjustment — doubling the light requires halving the aperture's width and vice versa — ultimately ensuring consistent exposure regardless of scene brightness.
Film Sensitivity and Versatility
Competing with the brilliance of its automatic exposure control is the EES-2's ability to accommodate different film speeds from 25 to 400 ISO. This versatility is achieved through a simple yet effective design — a ring on the lens that adjusts the exposure area of the light sensor based on the selected film speed. Such intelligent design allows photographers to use various film types without any electrical components.