P3D MAOFD great for mono wide-screen macro!

[abram klooswyk <abram.klooswyk@xxxxxx>]

Recently Tom Deering pointed at his stereobase graphs,
which are output from the so-called Bercovitz equation,
which, he stresses, is much better for close-up and macro
stereo than his (and Boris') "pet peeve", the 1/30 rule.

I have tested the equation, and what turns out?
It is even better than they say! Read on.

For a macro stereo close-up, I used a standard SRL,
24 x 36 mm film aperture, lens focal length 50 mm, on a
slide bar. I used also 50 mm extension, to get a 1:1 image.
Focussed at 100 mm, the camera had a 24 x 36 mm field of
view, at that distance.
As object I took a detail of a wood carving, the depth of
the cuts was only 10 mm.

The famous equation is:
                  an * af
b0  =  d *  ------------  * (1/f - 1/a)
                  af - an

"b0" stands for the Stereo Base.
(I have been pondering where the zero stands for.
 I believe it is just a decoration. You can't give a so
 important notion as the Stereo Base a symbol of only
 *one* character, can you?)

For d (deviation) it is recommended to take 1/30 of the
*effective* focal length, so in this case 100/30 = 3.3 mm.
(1/30 ???  Yes, in a way it resembles a 1/30 rule)
Nearpoint an = 100, Farpoint af = 110, focusing distance
a = 100, all in mm. Substituting I got:
b0 = 3.3 * 110000/10 * (1/50 - 1/100) = 36.3 mm

So the macro stereobase calculated with the famous formula
was 36.3 mm. Consequently, after the first picture I moved
the camera 36.3 mm on the slidebar, and took the second one.

And what did I get?
Yes, two mono pictures, but almost perfectly fitting
together as a wide-screen shot of 24 x 72 mm!

Stereo pictures have only depth, but you have to see this
marvelous wide-screen macro picture of this woodcut!

Now I've one problem left. When I leave Photo-3D, which
list should I join, Photo-Panorama or Photo-WideScreen?
In any case, I take the MAOFD equation with me.

Abram Klooswyk