 The uncoupled selenium light meter was replaced by a new electronically coupled light meter, using variable resistors for transferring the aperture and shutter control settings to the light meter.The new designation "Rollei 35 LED" resulted from the three light emitting diodes in the viewfinder, which indicated overexposure, correct exposure, or underexposure.In October 1977 the first datasheet appeared and in January 1978 preproduction started.