P3D Re: Stereophotographing anaglyphs

[Peter Davis <pd@xxxxxxxxxxxxx>]

At 10:46 AM 1/29/98 -0700, you wrote:
>On Thu, 29 Jan 1998, Dr. George A. Themelis wrote:
>
>> [deleted]
>> The idea in an anaglyph is to put *both* images in one film chip or
>> picture.  Consider using your regular SLR camera, put the red filter and
>> take one picture, then move, trying to maintain alignment as well as
>> possible, and then take another picture without advancing (double exposure)
>> with the blue filter in front of the lens.  I wonder if that is going to
>> work...  You can use print film for this too.
>> 
>
>Just a thought... has anyone tried the red/blue anaglyph zoom lens that
>Vivitar made a while back (red & blue semicircular filters within the lens
>- move in for instant, single exposure, anaglyphs; move them out of the
>way for normal pix). If I actually liked anaglyphs, I may have been
>tempted to buy one.

I had one of these for a while.  It was an interesting novelty, but
suffered from two problems that I could see:

   1)	cardboarding - I think because of the limited separation of the Q-dos
system, you get apparent depth between figures and background, for example,
but individual people, etc. look somewhat flat.

   2)	shots that contain reds and blues close to the filter colors produce
strong retinal rivalry effects, due to the object's appear white in one
shot and black in the other.

It was a great idea, and I really wanted it to work better than it did.

-pd


--------
                             Peter Davis
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