3. BASICS OF MODERN AUTOFOCUS

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THE BEGINNING OF the modern autofocus era begins with the Minolta Maxxum 7000, introduced in 1985. Until this, all lenses needed to be manually focused or, in some rare cases, were fixed and could only focus on subjects a certain distance away. The autofocus revolution upended the camera industry and ushered in a wave of new cameras and lenses that make the system work.

All the major manufacturers were anticipating this coming technology and introduced their own version of autofocus within a few years of each other. The first autofocus cameras were novel and interesting to many, but the professionals weren’t convinced. ...

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