At 11:56 AM 10/30/2005, P. J. Alling wrote:
All pentax auto focus cameras will do this, I think. Mount a manual focus
lens, focus on a point in space that a moving object will pass through,
(can't be moving too fast however, no 90 mph fast balls here), hold the
shutter release down. The camera will fire when the object moves the
point of focus.
Thanks, P.J and Godfrey (who also answered this question.) I thought that
might be what was being referred to, but I didn't know the technique had an
actual name, so I wasn't sure.
I suppose this only works best for relatively slow moving objects?
For example, I suspect that a nearby speeding car might move beyond the
point of focus by the time the shutter actually opens? I would think there
is probably a tiny amount of lag time between the focus detector being
triggered and the shutter actually opening. This might be just enough time
to allow a fast subject to move beyond the point of best focus.
take care,
Glen
