Re: CDAF lenses - question
CDAF - contrast detection auto-focus
as opposed to
PDAF - phase detection auto-focus
CDAF can be done in live view using the imaging sensor
PDAF uses (many) dedicated autofocus sensors using light reflected off the mirror
So micro 4/3 can only focus using CDAF.
My guess is that the autofocus control is shared between the camera's processor and the lens' processor, and that the lens needs the right firmware to be able to work in CDAF mode.
All lenses are capable of AF with the E-P1, I suspect with the E-PL1 too.
http://www.luminous-landscape.com/fo...hp/t37363.html
"the EP1 AF works with all Four Thirds SLR lenses (though it is probably very slow with the older 4/3 lenses, not designed specifically for CDAF)"
http://forum.fourthirdsphoto.com/showthread.php?t=48711
"I think that as E B said it has been a bad internet rumor that SWF lenses could not be CDAF compatible."