What is Back Button Focus all about?

Started 6 months ago | Discussions thread
WilbaW
Veteran MemberPosts: 8,691Gear list
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Re: What is Back Button Focus all about?
In reply to seeker moc, 5 months ago

seeker moc wrote:

I think the misunderstanding comes from the ambiguity of the term 'lock'. I think that WilbaW is using the term as it the focus 'locks on' to a subject and continues to vary focus to tracked the 'locked' subject; whereas Phhoenyxx is thinking of 'lock' as in the focus 'locks' at the current focal distance, and doesn't change even if the subject and/or camera moves.

No, I mean "lock" as in hold the focus where it is now, like you get when One-shot confirms focus, or when you tell AI Servo to stop. Conventional BBF just means you trigger AF independently of pressing the shutter button. You don't press the back button to lock focus, you press it to start autofocus (though it can be configured that way but that's not the context of this discussion).

Is there more proper terminology to distinguish between the two?

One-shot locks, Servo tracks.

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