servo mode is shutter priority release, the camera
tries to keep up by continuing to focus, predictive is
when it tries to predict ( and refocuses ) the
subjects movement. Predictive mode is automatically on
in multi frame advance mode, so all you have to do is
set normal single af and multi frame advance ( vs
single ), and hold the button down as the subject
comes towards you.

--- Glen O'Neal <[EMAIL PROTECTED]> wrote:
> Hello again everyone. I am hoping someone has some
> experience with
> predictive auto-focus. I have this feature on both
> my PZ-1p and my 645n.
> What this feature means to me is that the camera
> makes an attempt to
> "predict" where a moving object will be in order to
> get the most precise
> focus on that object at the time of shutter release.
> Okay, that makes sense.
> Here is where I have the problem. It is in the use
> of this feature. When I
> put either camera on "servo" for focus, the camera
> will allow me to fire the
> shutter whether the camera is in focus or not. I had
> read on a 645
> discussion thread that another 645n owner/user said
> that as a wedding
> photographer he uses the predictive auto-focus to
> photograph individuals
> coming down the aisle towards him. Okay, that makes
> perfect sense except
> that unlike "single" mode where the camera won't
> fire until the focus is
> complete, this mode fires "at will" so to speak. So
> how do you use this
> "predictive auto-focus". I could surmise that if you
> press the shutter
> release button half way the camera will focus. Then
> pressing it the rest of
> the way will release the shutter with the camera
> focused at that distance.
> With an object moving towards you, if it has moved
> far enough to have gone
> out of focus, then you have not achieved anything.
> So the question is; how
> does this work and how is it most effectively used.
> 
> Thanks in advance,
> Glen O'Neal (in Kansas City)
> 


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