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B Variable Aperture AE Control Method

Commonly known as "shutter priority EE," the Variable Aperture AE control method gives the photographer absolute control over the shutter speed to prevent camera shake. You select a shutter speed appropriate to the action and/or the lens you are using, and the camera automatically adjusts the aperture of the lens to precisely the proper f/stop or fraction thereof.

Silicon Photocell

The Silicon Photocell is a highly accurate and extremely stable light measuring cell having a wider range of sensitivity and much faster response to rapidly changing light levels than the conventional CdS cell. At ASA 100, the metering range of the Silicon Photocell is from EV 18 (1/1000 sec. at f/16) down to EV —2 (8 sec. at f/1.4), which is five f/stops more sensitive than the normal CdS cell. At ASA 25, the range is from 1/1000 sec. at f/8 down to 30 sec. at f/1.4. This increased sensitivity range is made possible by the development of a special logarithmic amplifier to intensify the low amount of current generated by the photocell in very dim light conditions.

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