FD lens mount. Identical to AI-1 with addition of Program mode, slightly extended ISO range, and user- interchangeable focusing screens. Manual metering with shutter priority AE, Program AE, center weighted metering pattern, exp. comp. Dedicated hot shoe, PC sync terminal. Shutter speed range 2 sec to 1/1000 plus B, flash sync at 1/60, self timer. ISO film speed range: 12-3200. Removable back. Body grip. DOF preview (also used for stopped-down metering with non-FD lenses or non- auto bellows). ACCESSORIES: * Data Back A * Power Winder A; Motordrive MA (4fps); Winder A2 (2fps). Recommended flash: A series, 155A, 177A, 188A, 199A, 577G, 533G. When a dedicted flash is fitted, and turned on, it will give information to the camera to set the proper shutter speed for flash sync as well as the proper f-stop on FD lenses.