T3D Re: Focusing Formula ?

[john bercovitz <bercov@xxxxxxxxxxx>]

> I think what the guy was looking for was just the opposite.  He's looking 
> to reduce his DOF, throwing fore and backgrounds out of focus in order to
> isolate the subject.

Yeah, I agree, that's what he was looking for.  My approach was to be 
inferred and that wasn't such a swell idea.  I should have said, "..and 
everything which is not in focus is out of focus."  I also meant to put in 
there the very valid point that it really is only a matter of degree.  For 
instance in my example of resolution of 1 part in 2000, everything outside 
of the zone would have res not as good as 1 part in 2000.  However, 1 part 
in 1000 is still pretty good so you might want to change even to 1 part in 
500 to get something more out of focus.  There just isn't a sharp cutoff
to work with.

John B


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