In March 1987, Canon launched the EOS650, the world's first AF (autofocus) SLR camera to realize electronic control for the entire system.

在1987年3月，佳能推出了EOS650，世界上第一个自动对焦(自动对焦)相机，实现电子控制整个系统。

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Unlike conventional binoculars, electronic autofocus keeps moving subjects sharply in focus at all times, eliminating the need to focus manually as your scene changes.

ENGADGET: Sony's Digital Recording Binoculars score a huge boost with $2,000 DEV-50V

Electronic autofocus allows the new binoculars to focus quickly and cleanly on subjects far away in high magnification and on subjects less than half an inch away when recording in 2D (minimum of 32 inches when recording in 3D).

ENGADGET: Sony's Digital Recording Binoculars score a huge boost with $2,000 DEV-50V