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Subject: Aredis 2 stereo lens for medium format cameras
Date: 2008-09-04 09:13:08
From: JR
Attachments :
    I am looking for some of the Aredis-2 stereo lenses.  These were f/3.5 35mm focal length matched pairs mounted side-by-side for use on medium format cameras, such as the Zenza-Bronica EC or the Mamiya 645 cameras.  They were made in France.  Does anyone have any information on these, like sources, prices and availability?

    An attachment gives more information on these, if this group accepts attachments.  If not, I can send it to anyone sending me an e-mail at:   stereoscope3d@gmail.com

    Sincerely,

    John A. Rupkalvis



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    stereoscope3d@gmail.com



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    stereoscope3d@gmail.com
    Subject: Re: Aredis 2 stereo lens for medium format cameras
    Date: 2008-09-04 10:52:01
    From: depthcam
    --- In MF3D-group@yahoogroups.com, JR wrote:
    >
    > I am looking for some of the Aredis-2 stereo lenses. These were
    f/3.5 35mm
    > focal length matched pairs mounted side-by-side for use on medium
    format
    > cameras, such as the Zenza-Bronica EC or the Mamiya 645 cameras.
    They were
    > made in France. Does anyone have any information on these, like
    sources,
    > prices and availability?
    >
    > An attachment gives more information on these, if this group
    accepts
    > attachments. If not, I can send it to anyone sending me an e-mail
    at:
    > stereoscope3d@...
    >
    > Sincerely,
    >
    > John A. Rupkalvis


    Hi John,

    I know the Aredis-2 very well. It was produced in France in the
    early eighties by "Société Internationale de Diavision En Relief
    Analogique" or "SIDERA" ("Aredis" is SIDERA spelled backwards). I
    corresponded at the time with its inventor, Louis Peretz, who based
    his design on the Italian Stereo Duplex 120 camera and also made an
    accompanying projection lens. He also had plans to produce a new
    camera patterned after the Super Duplex but that never materialized.

    In the early nineties, he considered launching his system in the USA
    but that failed. At that point he had sold out all his stock of
    lenses and would not consider another small scale production. I
    have never seen this lens for sale on the used market but one never
    knows...

    For the record: Although this lens was designed for medium format
    cameras and thus uses medium format film, it is not an MF stereo
    format in that the resulting images are two 24x24mm images similar
    to the Realist format. The object of putting two small size images
    side-by-side on one larger piece of film and mount them in MF (mono)
    mounts was to allow projection with a single projector outfitted
    with the special projection lens.

    Louis Peretz was also a proponent of the 30mm interaxial - which was
    necessary for the stereo pair to fit on the 120 film area (film
    oriented vertically) and believed that any larger interaxial
    was "excessive". This is why he never designed a base extender for
    the Aredis-2.

    Francois
    Subject: Re: Aredis 2 stereo lens for medium format cameras
    Date: 2008-09-04 21:56:09
    From: JR
    On Thu, Sep 4, 2008 at 9:51 AM, depthcam <depthcam@yahoo.ca> wrote:

    > Although this lens was designed for medium format
    cameras and thus uses medium format film, it is not an MF stereo
    format in that the resulting images are two 24x24mm images similar
    to the Realist format.

    > Louis Peretz was also a proponent of the 30mm interaxial - which was
    necessary for the stereo pair to fit on the 120 film area (film
    oriented vertically) and believed that any larger interaxial
    was "excessive".











    Thank you very much for the information.  Having noted the 30mm interaxial, I had figured that with a film width of 56mm, the image size would be something like 28mm x 24mm, not 24mm square (if not 28mm square).  It would seem like 8mm of usable film area is being wasted, or am I missing something?

    Anyway, thank you very much.  I have been thinking this might be ideal for use on a Vision Research Phantom 65 digital cinema camera, as the sensor on that measures 51.2mm wide by 30.5mm high.

    Best regards,

    JR


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    stereoscope3d@gmail.com