Re: Single lens 3D and the Vivitar Q-DOS lens

[P3D Peter Davis <pdavis@xxxxxxxxxxxxxxxxxx>]

> Peter Davis asks:
> 
> >"Does anyone know where I can get a Vivitar Q-DOS lens?  This talk
> >about anaglyphic photography is making me curious."
> 
> Peter, and anyone else interested in exploring the wacky wonderfull 
> world of SL3D, please, pretty please, don't use a Q-DOS lens unless you 
> already have one.
> 
> Make your own, it can't help but be far superior to Q-DOS! It's easy to 
> do. And, I will help you in any way I can.

Ok, I'll take you up on that.  I have a zoom lens I might be willing
to experiment with.  Some questions are:

   1)   Will the effect work at any focal length of the lens?

   2)   Will the effect work at any aperture setting?

   3)   Where can I get appropriately colored filter material?  Can
        I get glasses that match?

   4)   Is it as simple as putting the two filters, joined at the
        middle, at the diagragm of the lens?  Any tips for how to
        center the arrangement?  How to affix the filters?  I guess
        what's needed is a piece like this:

                          ___
                         / | \
                        (  |  )
                         \ | /
                          ---

   5)   Which side is red (from the point of view of looking from the
        camera towards the lens)?

   6)   Is there any way to make it switchable?  I believe the Q-DOS
        lets you move the filter in or out of the light path.

   7)   Is there anything else I should know before attempting this?

Thanks very much.

-pd

--------
Peter Davis                    "Education is not the             617/873-4145
BBN Educational Technologies    filling of a pail, but      FAX: 617/873-2455
70 Fawcett Street               the lighting of a fire."       pdavis@xxxxxxx
Cambridge, MA 02138                     -- W. B. Yeats

        URL:  http://copernicus.bbn.com/people/PDavis/


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