re: Argus and more

[P3D Gabriel Jacob <jacob@xxxxxxxxxxxxxx>]

Matthew B. George wrote in a recent post about the 3D camera by
Argus which is similiar (identical) to the Loreo. He mentioned
that Argus had 1000 eyes. Now that is a nice piece of trivia. :-)
Checked the dictionary and sure enough it was there. Actually
it mentions that Argus had 100 eyes. In any case, that's alot of
eyes. BTW the Argus camera needs as many as those eyes that it 
can get because of the rather underpowered flash. There was some
discussion recently about slave flashes. I have a post from
someone who made a homemade slave flash. I have included it at
the end of this post.

Regarding the Argus and how many eyes it actually does have, not
the Greek mythical one but rather the camera! It has two rather
than one as is commonly thought. Even though the Argus and Loreo
use a "beam splitter" it uses two lenses as opposed to one because
of the rather small lens diameter used in them. One small lens can't
intercept the two differing perspectives introduced by the
"beamsplitter" as is common with a SLR lens. One might wonder if
it is using two lenses after all, why do they need the mirror
arrangement or "beam splitter"? This is to increase the stereo
base and also to help facilitate transposing the stereo pair in
the mechanical arrangment the camera uses to transpose those
images. With an SLR and "beamsplitter" attachment, the SLR 
lens transposes the stereo pair.

Gabriel

====================================================================
             DIAGRAM FOR ELECTRONIC-FLASH SLAVE
====================================================================
Designed by Bob Perez / Dawson Institute of Photography

                       
             scr1         r1         cr1
            ______ g                         
           |      |----\/\/\/\------>|-----|
    |------|      |                        |
    |    a |______|------------------------|-----  to flash (-)
    |              c                            
    |
    |
    |--------------------------------------------  to flash (+)


scr1 = Light activated SCR 200 volt
r1   = 56k 1/2 watt resistor
cr1  = IN4005 600 volt 1 amp diode

This project requires only 3 parts and is very simple to assemble.
If your flash unit uses a two prong plug similar to the kind found
on most household cords, then the entire unit can be built into the
plug itself. The light activated SCR has a small lens on it and it
must be exposed to light from the main flash for the unit to work.

Should you have any questions on this project, I can be reached
here on CIS 76704,43

good luck 
Bob Perez

====================================================================


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