P3D Re: Curious Deep Math Tale

[boris@xxxxxxxxxxxx (Boris Starosta)]

>From: "Dr. George A. Themelis" <DrT-3d@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
...
>Michael Georgoff noticed something curious:
...
>>It appears that stereo base is dependent on f-stop.  That is all.
>>Stereo base in mm = 1200/f-stop.
...
>in Intallment #1 of his Technical Page (a "must have" book, BTW)
>Piper writes:
>
>"Make sure that the near and far points will fit between the f/5.6
>marks (he means the marks of the DOF scale).  For instance, you
>can take a projectable picture from 7 ft to INF, or from 5 ft to
>20 ft."
>
>So, he is using the DOF scale as a depth range scale.  He picks

Coming from Dr. T, I assume this particular f. stop (5.6) works for the
Realist? with 35mm f.l. lenses and 70mm interaxial?

What would be the equivalent "depth range defining f-stop" for my 50mm
lenses at a 70mm interaxial spacing?  This would be an excellent trick for
me to apply to my work.  I often find that my far points deviate too
much...

Thanks,




Boris Starosta            boris@xxxxxxxxxxxx
                          http://www.starosta.com
usa 804 979 3930          http://www.starosta.com/3dshowcase



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