It's hardly the case that "the first AE automation systems were all shutter preferred".
First autoexposure SLR cameras were the Konica Auto Reflex (1966 or thereabouts, shutter preferred), Pentax ES (1971, aperture preferred), Nikkormat EL (1972, aperture preferred), Minolta XE-7 (aperture preferred, 1974), Olympus OM-2 (aperture preferred, 1975), and Canon AE-1 (shutter preferred, 1976). The Pentax ES was notably the first that offered TTL metering. Godfrey On Oct 21, 2006, at 7:30 PM, P. J. Alling wrote: > The first AE automation systems were all shutter preferred. They > mostly > seemed to use a trap needle system. When the shutter was depressed > the > aperture needle was trapped at it's current location which limited the > lens stop down lever's travel. Most of these cameras did not allow > TTL > metering in manual mode. Typical is the Canon AE1 which required that > you read the aperture from the scale in the viewfinder and transfer it > to the lens, (the same is true of the various Konica AR cameras I've > handled, as well). Aperture preferred automation required a reliable > electronic shutter, which was one of Pentax's claims to fame, in > the ES > and ESII. These were introduced several years after the first shutter > preferred automation cameras. Later cameras added both (and therefore > program modes), as the electronically timed shutters were less > expensive > and more reliable. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
