Looking for instructions on how to use BEOOY

[gjlynx]

I recently acquired a BEOOY copy stand and am trying to figure out how to use it
with my 50mm Elmar. Anyone know where I can find some instructions? A 1/2 hr
of googling has not yielded anything very useful.

Thanks!

 

[projectbluebird]

Leica Manual (1944)

Leica Manual (1944)

Emphasis Added...
"The Behoo Device is used for obtaining reduction ratios of 1:1 1/2, 1:2 and 1:3 with the Leica. The greatest sizes of the objects at the three different ratios are, 36x54mm, 48x72mm, and 78x108mm. As a complete direction booklet is available for this attachment as well as the other Auxiliary Copy Devices it will not be necessary to make a reprint. the Behoo Device uses three Extension Tubes for securing the three different fixed focusing positions. When the No. 2 and No. 3 front lenses are used there is an attachment known as the Beooy which covers areas from 3 3/8x5 inches up to 8 1/2x12 1/2 inches."

Sorry, that's it. No mention of exposure factors specifically for the BEOOY, but the later table of exposure factors says "With all 50mm lenses except f/1.5 Xenon and f/1.5 Summarit"

If you can figure out the reproduction ratios, I have a couple of tables (from the Leica manual) that might be helpful.