Michael Ryan <[EMAIL PROTECTED]> wrote:
>My question is does it supply 3DMSBFF when I manually focus?
Yes.
>What's bothering me is when does it do the distance calculation?
>In AF, it's easy: it does the distance calculation when the AF
>sensors reckon they have achieved focus. But, with manual focus,
>it can never know when its master, the humanoid, has focused on
>the actual subject. Therefore, how can it apply distance
>information into the equation?
The camera knows at what distance the lens is focus with D lenses
(that is its function). It doesn't matter whether you manually
focused, AF'd, or didn't focus at all. The lens basically tells
the camera, "The lens is focus at distance X." AFAIK, every Nikkor
has a distance scale on the lens barrel. To further demonstrate,
if you were to focus on something (manually or AF) without telling
me the subject then hand me your camera/lens without changing anything,
I could tell you the distance to the focal plane. I would do this
by just looking at the distance scale. That is basically all the
D lens does.
David Johnson
