On Dec 10, 2010, at 11:45 AM, Mark Roberts wrote: > Jack Davis wrote: > >> I wish there were an AF-C custom function setting available wherein I could >> disallow the shutter's releasing unless focus is achieved. Still, for >> special affects, re-focus or.. I'd like to retain a shutter priority option. >> Make sense to anyone else? > > How would that work? AF-C is for predictive autofocus of moving > subjects so, by definition, it has to fire when the subject isn't in > focus (choosing the proper delay so that - if all goes well - the > subject will be in focus by the time the mirror goes up and the > shutter opens). > I don't think continuous autofocus is predictive. It just continues to adjust focus as the shutter button is held down at least half way. I think that if it were predictive, it would work only for one rate of subject movement. By prioritizing focus over speed, it will delay firing in machine-gun mode until it thinks it has a lock. Paul > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions.
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