Sony SLT-A58 - Manual (Page 6)

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Capture even challenging subjects clearly
Target frame size adjusts to suit the characteristics of the subject.
point — without having to search.
When the On (Lock-on AF w/ shutter)
setting is selected, you can press the
shutter button halfway to activate
Lock-on AF* and view your subject
fully focused in the viewfinder or
LCD screen. Lock-on AF combines
with your selected AF area mode to
instantly lock on your subject and
take advantage of highly accurate,
Full-time Continuous AF. Now it’s easier than ever to keep
moving subjects in focus. Through
proprietary Sony Translucent Mirror
Technology and subject size detec-
tion, new Lock-on AF continuously
adjusts target frame size based on
various subject characteristics and
dramatically increases the in-focus
rate. Even if your subject’s face can-
not be detected, it ensures smooth,
stable focusing using the optimal AF
New Lock-on AF for tracking moving subjects
* Shutter button activation is only available in AF-C mode.
Lock-on AF Conventional Object Tracking
Unlike conventional Object Tracking, Lock-on AF on the 58 keeps tracking your moving subject even if
his or her face moves outside the AF area.