The Olympus E-3’s autofocus system is its most touted feature. The twin cross type (fully biaxial) 11-point autofocus system is based on proprietary Olympus technology that uses a tooth-pattern phase detection sensor. Each of the 11 sensors has two data points, combining for a total of 22 data points to focus on both the horizontal and vertical axis. A second layer has 11 more cross focus points for an additional 22 data points, totaling 44 autofocus points readable by the sensor.
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