Single lens Stereoscopy in the 1600,s?

[P3D Peter Homer <P.J.Homer@xxxxxxxxxxxxxxxxx>]

I am interested in William Carters statement "Single lens stereoscopy has
beeen around since at least the 1600,s ,a full 250 years before
Wheatstone." As I have being trying to find out about the possibility of
stereo before its official invention/discovery . Leonardo-Da-Vinci seems to
have invented a stereo camera obscura but I no of no evidence that he made
any drawings with it let alone make a stereoscope or even discover free
viewing to view them. Brewster claimed that two paintings by the florentine
artist Cimenti were stereoscopic but the effect is apparently accidental
and Brewster seems to have been determined to prove that Wheatstone did not
invent/discover stereoscopy . According to Salvador the Dutch artist Gerard
Dou produced stereo paintings and this inspired Dali to produce his own.
There is a reproduction of a Dou pair in the Japanese Stereograms 2 book
but they are small and the efffect is indecisive.   There was an article in
the UK stereoscopic society Journal recently about an example of possible
stereo and anamorphic  images produced in the 1600,s . I know of large lens
viewers where both eyes could be used to view painted images and even
binocular ones which viewed a single image from at least the late 1700,s.
These if they produced stereo images at all probably worked by
chromostereopsis as the lenses then would have little or no achromatic
correction. I understood that SL3D used anaglyph which was not invented
until the 1850,s by D'Almeida and how would the images be created in the
1600,s ?. William Carter could reply to me direct with any further
information if he feels it may not be of general interest to the group.
P.J.Homer



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