Doesn’t work anymore in full automatic mode!!
The Canon A-1 is an advanced-level Single-lens reflex camera (SLR) 135 film camera for use with interchangeable lenses.
The A-1 is a historically significant camera. It was the first SLR to offer an electronically controlled programmed autoexposure mode.
The A-1 accepts any Photographic lens with the Canon FD lens mount or Canon New FD pseudo-bayonet mount (sometimes called the FDn mount, introduced 1979). It can also use most earlier FL lenses and some even older R (or Canomatic) series lenses, albeit with reduced functionality. This excludes all of Canon’s EF autofocus lenses (introduced in 1987).