>
> >I can't believe this discussion has gotten so esoterical--learn how to
use
> >the DOF preview button (that's not the same thing as the CF) and what it
is
> >telling you, and just push the damned thing....I've never ever on ANY
camera
> >had the viewfinder show me what's in and out of focus without using DOF
> >Preview. Unless the whole.......
.....
> Greg - what you are missing is my original thought - the DOF should
> only INCREASE the dof that you see as it is shutting down the
> aperture, at least that's how I understand it.
>
> Again, when using a lens like the 50/1.4 if you shoot a pic at 1.4 you
> will get someone's nose in focus but their ears will start to blur and
> couple of feet behind them is completely out of focus.
>
> This is NOT what I see when looking through my 10s with 1.4/50
> attached. The DOF preview button should be irrelevant as it should
> only increase DOF if I'm not off my rocker here.
> --
Dear Paul
I an see that your message has made a lot of discussion and confusion here.
You are absolutely right about DOF at full opening; if you shoot at wide
open the DOF preview will not change anything in the viewfinder. When
viewing the picture through viewfinder you should ( theoretically ) see what
you will get in focus.However the ground glass in SLRs may not show things
exactly as they are. It does its job at small apertures, and even then it
requires some practice (which I have not yet mastered) to see the real depth
of field, but at full opening it is not that accurate. Heck, I can't even
find the DOF when closed down, the damn view gets too dark.
I believe that the original purpose of the ground glass is to approximate
the correct focus.
Personally I would/could never trust the viewfinder for DOF, but get a good
chart of DOF for fifferent focal lengths.
BR
Olli
PS. This advertisement below your message is not exactly about selling or
buying EOS equipment and, as the list rules state, no spam is allowed in
this list. I would very much appreciate if you'd remove it from your future
posts.
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