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Nikon FM3A is a SLR film-based camera released in July 2001, providing aperture-priority auto and manual exposure controls. Nikon's first SLR camera to combine an aperture-priority auto-exposure (AE) mode is Nikkormat (Nikomat in Japan) EL introduced in 1972. The aperture-priority auto-exposure (AE) mode allows the user to easily obtain the correct exposure by selecting a desired aperture, since the camera automatically determines the optimum shutter speed for the selected aperture. This mode was incorporated in Nikon F3, FE and other various models. It was the most common automatic exposure control system before the emergence of the programmed auto-exposure in the 1980s, which automatically selects an optimum combination of aperture and shutter speed.