PetaPixel The Anatomy of Autofocus: How Cameras and Lenses Achieve Perfect Focus

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A camera screen displays a focused image of two patterned pillows on a blue-striped couch, with green focus brackets over the pillows and camera settings shown at the bottom.

Autofocus (AF) is one of the most significant advancements in the history of photography. From the first autofocus camera -- the Konica C35 AF in 1977 -- to the first true autofocus ILC, the Minolta Maxxum 7000. Although manual focus still has its devotees -- especially in genres that reward deliberation, such as macro, landscape, or vintage shooting -- autofocus has become the default expectation for most modern photographers.

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