stereo in one paragraph!

[P3D John Bradley <106374.3315@xxxxxxxxxxxxxx>]

 I am writing a short article about early photography in my 
home County of Derbyshire, England. As part of the article
 I naturally want to cover stereo. This is for a non specialist,
 "local history" audience , and most of the readers will know
 nothing whatsoever about stereo . I need to include a 
 simple one paragraph explanation of early stereo photography  ,
 as a prelude to talking about 19th Century stereocards. 
This is my best effort so far, and I would welcome any comments
 or suggestions for improvement. Is this accurate? Any suggestions
 for making it snappier? Responses on or off the list 
 would be appreciated.

BEGIN
 The process of stereoscopic photography , sometimes referred
 to as 3D (three dimensional) photography was developed as
 soon as the camera became available , and built on the work
 of the English scientist Wheatstone , who had developed the
 technique originally with stereoscopic drawings. Two photographs
 are taken with the spacing between them equivalent to the spacing
 between the human eyes. Because of their two points of view
 these  images are slightly diffferent-  as are the two images
 we usually see with our  eyes. These two photos are then
 mounted on a single card, and viewed in a stereoscope.
 The left eye sees the left picture , and the right the right picture. 
The brain fuses these two pictures together to form a single image ,
 which has all the sense of depth and distance which we see
 in the real world , but which is absent in normal flat photography.
 The stereoscopic technique reappears though the twentieth
 century , with 1950s 3D movies , the ViewMaster 3D viewer ,
 and modern high tech 3D movies at Epcot centre and 
Disneyland all making use of the same basic principles.
 Most middle and upper class families would have owned
 a stereoscope , and the stereoscopic photographs to be 
viewed in them were sold in their millions.
END
Thanks in advance
John Bradley
e-mail JB3D@xxxxxxxxxxxxx


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