Cameras Focus Modes Explained: When to Use Continuous Auto Focus, Single Auto Focus or Manual Focus
Autofocus Has Ruined Quality
An autofocus optical system uses a sensor, a control system and a motor to focus on an automatically or manually selected point or area. An electronic rangefinder has a display instead of the motor; the adjustment of the optical system has to be done manually until indication. Autofocus methods are distinguished by their type as being either active, passive or hybrid variants.
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