[photo-3d] Stereo Camera Obscura (was walk-in stereo)

["Harold R. Baize" <baize@xxxxxxxxxxxxx>]

Bruce Springsteen asked: 
 
> Did Harold Baize ever post any details on the workings of his walk-in
> camera obscura stereo chamber at Burning Man?  I'm really interested in
> the idea of stereo installations, and the picture at his site looks neat
> but confuses me.  Howzit work?  You there Harold?

No Bruce I didn't post details. It worked well. It was not 
finished until just about the last day of the festival and 
only a few people got to enjoy it. 

Here are some details. Two 2500mm fl lenses, 50mm diameter about eight 
inches apart, with polarizing filters and carefully mounted with two 
front surface mirrors (surplus from US tanks) to reflect the image onto 
a silver screen on the floor of the viewing chamber (camera). The mirrors 
were angled to adjust the separation of the images on the viewing surface. 
It worked, and the fun part was the surrealism of it. The image seemed 
smaller than reality and with slightly greater depth due to the 
slight hyper separation of the lenses. It was fun. 

Next year we will build a better Camera Obscura, possibly with larger 
lenses and more mirrors, and a bigger viewing room (camera) with a 
better entrance door. 

Harolddd