Henry Posner/B&H Photo-Video schrieb:
>
> At 10:23 AM 02/28/2001, you wrote:
> >The reason may be, that it's plain simply true. DOF depends on focal length.
> >Pick your favorite DOF calculator and try it out. Or just do the following:
>
> <snip>
>
> Sorry, but this is simply wrong. As I posted yesterday, D-o-F depends, all
> else being equal on image size. Two lenses, a 20mm & a 200mm set to the
> same aperture and set at different distances to the target so the target is
> the same size in the finder (and on film) will return the same D-o-F. The
> angle of view may vary but D-o-F will not.
I think we agree to disagree, because this is off topic here. I'll leave
it up to anyone interested to do the test or the math and draw their own
conclusions. Formulae for DOF can be found at
http://www.photo.net/photo/optics/lensFAQ
Additionally, question 15 of this FAQ deals with this topic.
Thomas Bantel
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