P3D TDC Vivid lens spacing

["H a r o l d B a i z e" <baize@xxxxxxxxxxxxx>]

I know this has been discussed before on the list but, 
in response to Rob's question:

>     Does the TDC actually provide a format a little narrower than the
>realist? (i.e., less than 5 full sprockets?), does it sacrifice film to
>permit 5-sprocket images closer to each other? Or are there prisms to
>spread the image fields apart and form the images 15 sprockets apart?

The TDC Vivid brings the lenses together while still keeping
15 sprockets of film between the lenses. This is accomplished 
by maintaining the distance the film travels. A sprocket wheel 
guides the film through an indentation between the lenses. 
The shortest distance between two points it aint. I used this 
technique to bring the lenses together when I merged a couple 
of Argus C-3 bricks into a full frame stereo camera. 

I love the TDC Vivid, but mostly it sits on the shelf. I'm 
afraid I'll scratch it.

Harolddd.


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