82
These styles of focus use “predictive” focus determination.
The camera computes the next focus position based upon the velocity
and direction of the movement in the subject based upon trends from the
previous estimates.
In the Panasonic Lumix FZ200 this calculation is made every 1/100
second. Of the two modes AFF (autofocus flexible) is cited as the one to
use if there might be a change in direction of the subject, i.e. the
predicted course or velocity could change.
Children or pets running might be an example here.
In contrast the AFC (autofocus continuous) style is tuned to react better to
constant velocity and direction such as with auto mobiles,
aero planes
and trains!
AFC focus Style
Because of the speed at which the focus lens, in the lens system, can be
physically moved there is a maximum rate at which subject
movement
can be accurately corrected.
To Next Page
Loading...
