programmed autoexposure, in many variations, became a standard camera feature by the mid-1980s. this is the order of first introduction of 35 mm slrs, by brand, with a computer programmed autoexposure mode, before the rise of autofocus (see next section): 1978, canon a-1 (plus ae-1 program, 1981 and t50, 1983); 1980, fujica ax-5; 1980, leica r4; 1981, mamiya ze-x; 1982, konica fp-1; 1982, minolta x-700; 1982, nikon fg (plus fa, 1983); 1983, pentax super program (plus program plus, 1984 and a3000, 1985); 1983, chinon cp-5 twin program (also first with two program modes); 1984, ricoh xr-p (tied with canon t70 as first with three program modes); 1985, olympus om-2s program; 1985, contax 159mm; 1985, yashica fx-103. of the brands active in the mid-1970s, cosina, miranda, petri, praktica, rolleiflex, topcon and zenit never introduced programmed 35 mm slrs; usually the inability to make the transition forced the company to quit the 35 mm slr business altogether. note that the asahi pentax auto 110, pentax auto 110 super (pocket instamatic 110 slrs from 1978 and 1982) and pentax 645 (a 645 format slr from 1985) also had programmed autoexposure.