Another feature of the EOS-1N, and other professional models in the range, is the provision for a precise viewfinder indication of exposure in manual mode. This had previously been provided in fully manual cameras such as the F-1, but older Canon cameras with automatic exposure modes merely provided a recommended exposure reading in manual mode, leaving the user to accept the offered settings or not. The EOS-1N provides a viewfinder readout similar to the old F-1's needle display, but in electronic LCD form showing steps in 0.3, 0.5 or 1 stops. Like the EOS 5, the internal displays of the EOS 1N self-adjust in brightness in response to the brightness level of the subject.