First produced in 1962, the Agfa Optima 1a or Agfamatic was one of the first fully automatic scale-focusing 35mm film cameras. The successor to German camera manufacturer Agfa's Optima 1 camera, the camera employed a selenium cell that generated a voltage related to the luminance, to both measure the light level and to provide the power required for automatic setting of aperture and shutter speed. Other features included a flash mode which overrode the automatic mode to set the camera shutter speed to 1/30s, and a bulb mode for long exposures.http://blia-gear.blogspot.ae/2012/12/agfa-optima-1a.html
References
External links Optima on Camera-wiki.org Agfa Optima 1a at Lomography, examples of photographs