The Canon A-1 is an advanced-level single-lens reflex (SLR) 35 mm film camera for use with interchangeable lenses. It was manufactured by Canon Camera K. K. (today Canon Incorporated) in Japan from April 1978 to 1985. It employs a horizontal cloth-curtain focal-plane shutter with a speed range of 30 to 1/1000 second plus bulb and flash synchronization speed of 1/60 second. It has dimensions of height, width, depth and weight. Unlike most SLRs of the time, it was available in only one color; all black. The introductory US list price for the body plus Canon FD 50 mm f/1.4 SSC lens was $625; the camera body was generally sold with a 30–40% discount (roughly $375 to $435). The A-1 is a historically significant camera. It was the first SLR to offer an electronically controlled programmed autoexposure mode. While the Minolta XD came out in 1977 with electronic control exposure modes, specifically Aperture Priority, Shutter Priority, Full Manual modes, as well as an "off the modev dial" full program exposure mode, the Canon A-1 offered "Program" mode. Instead of the photographer picking a shutter speed to freeze or blur motion and choosing a lens aperture f-stop to control depth of field (focus), the photographer relied on the A-1's microprocessor to automatically select a compromise exposure based on light meter input. Virtually all cameras today have at least one program mode. Features The A-1 accepts any lens with the Canon FD breech lock mount (introduced in 1971) 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 bayonet mount autofocus lenses (introduced in 1987). During the late 1970s and the 1980s, there were approximately 55 Canon FD lenses available for purchase. They ranged from a 7.5mm f/5.6 fisheye to an FD 800mm f/5.6 telephoto, and included lenses with maximum apertures to f/1.2 and a line of L-series lenses of exceptional quality. Accessories for the A-1 included the Canon motor drive MA (automatic film advance up to 5 frames per second), the Canon Databack A (sequential numbering or date stamping on the film), and the Canon Speedlight 155A (guide number 56/17 (feet/meters) at ASA/ISO 100) and Canon Speedlight 199A (guide number 98/30 (feet/meters) at ASA/ISO 100) electronic flashes. The A-1 is a battery-powered