P3D Re: PHOTO-3D digest 2965

[Bob_Maxey@xxxxxxxxxxxx]

>>In the 5P mounting system it indeed means masking off identical strips
at
the outer side of both apertures of a standard mount, or alternatively,
remove a center strip from the mount, in both cases bringing the viewing
stereowindow closer.
This means in fact for the 5P system not a 1/30 base but a 1/15 base.
So depth range not from infinity to 2 meter (7 feet) but to one meter.
The f-stop required for this depth range could also be used in more
close
focussing, with far point closer than infinity.

I have a problem with something quoted above....please tell me where my
reasoning is faulty. If one is modifying the separation in the mount, to
me, this is NOT a modification of the Stereo Base. To my way of reasoning,
once the camera takes the stereo pair, the true stereo base is set, and
regardless of how much the slide mount or apertures are manipulated or
changed, the stereo base is still the same. It is fixed.

If I take a photograph in which I have a separation of say 5 inches, no
amount of changing the separation or apertures of the mounts will alter
that fact. By the above reasoning, I can shoot (To some extent) slide-bar
stereo without regard to any specific stereo base, and fix / correct it in
the mounting.

Please, none of the usual "You are a bonehead" comments, just a good
explanation of my reasoning...good or bad.


RM



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