the Nikon and Canon cameras can track an object wandering across the FOV once it has acquired focus once, you don't even have to keep it on the same sensor. that's part of the reason the Canon 1Ds Mk2 has so many sensors.
Herb... ----- Original Message ----- From: "mike wilson" <[EMAIL PROTECTED]> To: <pentax-discuss@pdml.net> Sent: Saturday, January 15, 2005 9:49 AM Subject: Re: *istD AF performance (was Re: Sigma 2.8 Zoom lens comments) > But _as Jens said_ it is not the same as locking on in weaponry, which > is an "active" system compared to autofocus. Not the correct > terminology, I know, but is the best descriptor I can use. > > IAC, I suspect we agree that a system where the photographer decides > what is to be focused on is best. If we cannot have a system that will > work to maintain focus (no matter where the focus point goes > afterwards) once the "lock" is enabled, then present systems are the > best we can hope for.
