P3D Re: Beamsplitters

[Jacques Cornet <jacques.cornet@xxxxxxxxx>]

To Ole Hansen note on Zeiss beamsplitters, I would add that Zeiss also made
two other "beamsplitters" for its Contaflex cameras. I used one, forty years
ago, with great pleasure. That last model incorporated the first element of
a 50 mm. Tessar (so the name "Pro-Tessar"). It was made, not of mirrors, but
of a bloc of optical glass. I saw one (but did not ask the price) at a
Photo-puces last month.
Zeiss also made a projection beam-splitter (the Sterikon 10) to be used in
front of their Orikar 2,5 projection lens. I still have it.

The "horizontal pictures" beamsplitter is the Swiss Giauque. Easily adapted
to most reflexes, it incorporates two special F.38mm 1/8 "fixfocus" lenses.
Using your reflex as for a "vertical", you get two "over/under" pictures on
the usual 8 perf.format. A projection beamsplitter has to be used. No trace
of viewer...
Prices, 10 years ago: taking lenses 950 Swiss francs, projector lenses diam
42mm SF 320, 52 mm SF 480. Never saw them, secondhand or otherwise. 
Maybe mr. Giauce still lives. His address was:
Giauque 3-D
box 136 Pt Lancy 2
CH 1213 Geneve 

Third, and last: Images Optiques (RÈsidence Les Muriers, F 91800
Boussy-Saint-Antoine, France, also 10 years ago) made a kind of
beamsplitter, or better "beam diverter" to project 5 or 7 perf. slides in
special 6x6 mounts. So you could use a normal Rollei 6x6 projector...

Jacques Cornet
Jacques Cornet
Eikenlaan, 22
B 1640 Sint Genesius Rode
Belgium
Tel/Fax 00.32.(0)2.358.26.96


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