PanoTools:
Re: entrance pupil - nodal point
Dave 360texas.com 2004-Nov-11 00:11:57
All this sounds like double talk. "it won't.. but it will".
Actually the Nikkor FC-E8 fisheye lens adapter has no moving parts..
the lens front entrance pupil location is more than 4 cm (not
millimeter)in front of the adjustable aperture ring inside the Nikon
990 lens compartment.
Let us be reasonable...
--- In #removed#, "John Houghton" <#removed#>
wrote:
>
> --- In #removed#, "Erik Krause" <#removed#>
> wrote:
> > On 10 Nov 2004 at 8:59, John Houghton wrote:
> > Sorry, but from optical geometry this can not be true. You don't
> > change refraction by putting an aperture somewhere, hence you
can
> not
> > modify the location of nodal point with this technique.
>
> I did say that this did not change the position of the nodal
point.
> It is nevertheless the case that if you experimentally determine
> the "no parallax" point, it corresponds to the position of the
> aperture, not the nodal point. Try it yourself.
>
> John
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