Moose wrote:
> A perfectly accurate AF, when you located the AF point on your subjects
> eye, would ask you whether you wanted the focal plane at the nearest
> point of the roughly spherical object it detects, the deepest visible
> point of it, or at an average. Then it would want a discussion of the
> amount and desired direction of DOF.
One thing that I'd really like would be a numeric display of DOF --
the camera knows what lens I'm using, what the focal length is, what the
aperture will be when it stops down to take the photo, so it can do the
math to tell me how much DOF I have.
Sure, I can hit the 'stop down' button, but I very rarely find that to
be much use -- even on OMs with big bright viewfinders, I can't tell
which bits of the image will be in focus in the final thing, or at least
not well enough to be useful.
(now, this is one place where a lot of AF spots and some whizbang
computing could possibly be handy -- while the camera is racking focus
back and forth to get things "in focus", it could track the in-focus
distance to each focus point.
That then gives it a 3-d model of the world, because it knows how far
away the world is at each of the AF points -- and it could then
interpolate, and _highlight_ the bit of the image that would be in
focus.. This only works as long as the world is 'smooth' between AF
spots, of course, but I think otherwise it should theoretically be
possible.)
-- dan
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